396838632129 has 4 divisors (see below), whose sum is σ = 529118176176. Its totient is φ = 264559088084.

The previous prime is 396838632119. The next prime is 396838632247. The reversal of 396838632129 is 921236838693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 396838632129 - 2²⁰ = 396837583553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (396838632119) 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, 66139772019 + ... + 66139772024.

It is an arithmetic number, because the mean of its divisors is an integer number (132279544044).

Almost surely, 2^396838632129 is an apocalyptic number.

It is an amenable number.

396838632129 is a deficient number, since it is larger than the sum of its proper divisors (132279544047).

396838632129 is a wasteful number, since it uses less digits than its factorization.

396838632129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132279544046.

The product of its digits is 20155392, while the sum is 60.

The spelling of 396838632129 in words is "three hundred ninety-six billion, eight hundred thirty-eight million, six hundred thirty-two thousand, one hundred twenty-nine".