396929679637 has 4 divisors (see below), whose sum is σ = 396972145900. Its totient is φ = 396887213376.

The previous prime is 396929679613. The next prime is 396929679673. The reversal of 396929679637 is 736976929693.

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

It can be written as a sum of positive squares in 2 ways, for example, as 323816764401 + 73112915236 = 569049^2 + 270394^2 .

It is a cyclic number.

It is not a de Polignac number, because 396929679637 - 2¹¹ = 396929677589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396929679677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21219108 + ... + 21237805.

It is an arithmetic number, because the mean of its divisors is an integer number (99243036475).

Almost surely, 2^396929679637 is an apocalyptic number.

It is an amenable number.

396929679637 is a deficient number, since it is larger than the sum of its proper divisors (42466263).

396929679637 is an equidigital number, since it uses as much as digits as its factorization.

396929679637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42466262.

The product of its digits is 1249949232, while the sum is 76.

The spelling of 396929679637 in words is "three hundred ninety-six billion, nine hundred twenty-nine million, six hundred seventy-nine thousand, six hundred thirty-seven".