70797631 has 4 divisors (see below), whose sum is σ = 71593200. Its totient is φ = 70002064.

The previous prime is 70797593. The next prime is 70797653. The reversal of 70797631 is 13679707.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70797631 is a prime.

It is a super-2 number, since 2×70797631² = 10024609110424322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70797691) 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, 397651 + ... + 397828.

It is an arithmetic number, because the mean of its divisors is an integer number (17898300).

Almost surely, 2^70797631 is an apocalyptic number.

70797631 is a deficient number, since it is larger than the sum of its proper divisors (795569).

70797631 is an equidigital number, since it uses as much as digits as its factorization.

70797631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795568.

The product of its (nonzero) digits is 55566, while the sum is 40.

The square root of 70797631 is about 8414.1328133088. The cubic root of 70797631 is about 413.6879859472.

The spelling of 70797631 in words is "seventy million, seven hundred ninety-seven thousand, six hundred thirty-one".