70070491 has 4 divisors (see below), whose sum is σ = 70227000. Its totient is φ = 69913984.

The previous prime is 70070479. The next prime is 70070519. The reversal of 70070491 is 19407007.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19407007 = 241 ⋅80527.

It is a cyclic number.

It is not a de Polignac number, because 70070491 - 2¹³ = 70062299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70070401) 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, 77581 + ... + 78478.

It is an arithmetic number, because the mean of its divisors is an integer number (17556750).

Almost surely, 2^70070491 is an apocalyptic number.

70070491 is a deficient number, since it is larger than the sum of its proper divisors (156509).

70070491 is a wasteful number, since it uses less digits than its factorization.

70070491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156508.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 70070491 is about 8370.8118483215. The cubic root of 70070491 is about 412.2668233425.

Adding to 70070491 its reverse (19407007), we get a palindrome (89477498).

The spelling of 70070491 in words is "seventy million, seventy thousand, four hundred ninety-one".