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70380481 = 239294479
BaseRepresentation
bin1000011000111…
…10101111000001
311220102200212111
410030132233001
5121004133411
610552255321
71513136623
oct414365701
9156380774
1070380481
1136800996
121b6a1541
1311772a72
1494c0c13
1562a3721
hex431ebc1

70380481 has 4 divisors (see below), whose sum is σ = 70675200. Its totient is φ = 70085764.

The previous prime is 70380469. The next prime is 70380511. The reversal of 70380481 is 18408307.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18408307 = 67727191.

It is a cyclic number.

It is not a de Polignac number, because 70380481 - 223 = 61991873 is a prime.

It is a super-2 number, since 2×703804812 = 9906824211582722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70380421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147001 + ... + 147478.

It is an arithmetic number, because the mean of its divisors is an integer number (17668800).

Almost surely, 270380481 is an apocalyptic number.

It is an amenable number.

70380481 is a deficient number, since it is larger than the sum of its proper divisors (294719).

70380481 is a wasteful number, since it uses less digits than its factorization.

70380481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294718.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 70380481 is about 8389.3075399582. The cubic root of 70380481 is about 412.8738815272.

Adding to 70380481 its reverse (18408307), we get a palindrome (88788788).

The spelling of 70380481 in words is "seventy million, three hundred eighty thousand, four hundred eighty-one".

Divisors: 1 239 294479 70380481