397623903663 has 16 divisors (see below), whose sum is σ = 637792728320. Its totient is φ = 215255045376.

The previous prime is 397623903601. The next prime is 397623903683. The reversal of 397623903663 is 366309326793.

It is not a de Polignac number, because 397623903663 - 2²⁶ = 397556794799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397623903683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 498275170 + ... + 498275967.

It is an arithmetic number, because the mean of its divisors is an integer number (39862045520).

Almost surely, 2^397623903663 is an apocalyptic number.

397623903663 is a deficient number, since it is larger than the sum of its proper divisors (240168824657).

397623903663 is a wasteful number, since it uses less digits than its factorization.

397623903663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996551166.

The product of its (nonzero) digits is 19840464, while the sum is 57.

The spelling of 397623903663 in words is "three hundred ninety-seven billion, six hundred twenty-three million, nine hundred three thousand, six hundred sixty-three".