70381481 has 2 divisors, whose sum is σ = 70381482. Its totient is φ = 70381480.

The previous prime is 70381433. The next prime is 70381483. The reversal of 70381481 is 18418307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47389456 + 22992025 = 6884^2 + 4795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70381481 is a prime.

It is a super-2 number, since 2×70381481² = 9907105735506722, which contains 22 as substring.

Together with 70381483, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4139186 and since 70381481 and 4139186 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (70381483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35190740 + 35190741.

It is an arithmetic number, because the mean of its divisors is an integer number (35190741).

Almost surely, 2^70381481 is an apocalyptic number.

It is an amenable number.

70381481 is a deficient number, since it is larger than the sum of its proper divisors (1).

70381481 is an equidigital number, since it uses as much as digits as its factorization.

70381481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 70381481 is about 8389.3671394212. The cubic root of 70381481 is about 412.8758369554.

Adding to 70381481 its reverse (18418307), we get a palindrome (88799788).

The spelling of 70381481 in words is "seventy million, three hundred eighty-one thousand, four hundred eighty-one".