393630928631 has 4 divisors (see below), whose sum is σ = 394079767512. Its totient is φ = 393182089752.

The previous prime is 393630928597. The next prime is 393630928661. The reversal of 393630928631 is 136829036393.

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

It is a cyclic number.

It is not a de Polignac number, because 393630928631 - 2²⁶ = 393563819767 is a prime.

It is a super-2 number, since 2×393630928631² (a number of 24 digits) 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 (393630928661) 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, 224418125 + ... + 224419878.

It is an arithmetic number, because the mean of its divisors is an integer number (98519941878).

Almost surely, 2^393630928631 is an apocalyptic number.

393630928631 is a deficient number, since it is larger than the sum of its proper divisors (448838881).

393630928631 is an equidigital number, since it uses as much as digits as its factorization.

393630928631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448838880.

The product of its (nonzero) digits is 3779136, while the sum is 53.

The spelling of 393630928631 in words is "three hundred ninety-three billion, six hundred thirty million, nine hundred twenty-eight thousand, six hundred thirty-one".