70636931 has 2 divisors, whose sum is σ = 70636932. Its totient is φ = 70636930.

The previous prime is 70636919. The next prime is 70636949. The reversal of 70636931 is 13963607.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70636931 - 2²⁶ = 3528067 is a prime.

It is a super-2 number, since 2×70636931² = 9979152042197522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 70636891 and 70636900.

It is not a weakly prime, because it can be changed into another prime (70636031) 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 as a sum of consecutive naturals, namely, 35318465 + 35318466.

It is an arithmetic number, because the mean of its divisors is an integer number (35318466).

Almost surely, 2^70636931 is an apocalyptic number.

70636931 is a deficient number, since it is larger than the sum of its proper divisors (1).

70636931 is an equidigital number, since it uses as much as digits as its factorization.

70636931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 70636931 is about 8404.5779786971. The cubic root of 70636931 is about 413.3747456050.

The spelling of 70636931 in words is "seventy million, six hundred thirty-six thousand, nine hundred thirty-one".