397663633379 has 16 divisors (see below), whose sum is σ = 414287879712. Its totient is φ = 381370249728.

The previous prime is 397663633357. The next prime is 397663633399. The reversal of 397663633379 is 973336366793.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397663633379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397663633399) 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, 1180217 + ... + 1479269.

It is an arithmetic number, because the mean of its divisors is an integer number (25892992482).

Almost surely, 2^397663633379 is an apocalyptic number.

397663633379 is a deficient number, since it is larger than the sum of its proper divisors (16624246333).

397663633379 is a wasteful number, since it uses less digits than its factorization.

397663633379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299606.

The product of its digits is 208324872, while the sum is 65.

The spelling of 397663633379 in words is "three hundred ninety-seven billion, six hundred sixty-three million, six hundred thirty-three thousand, three hundred seventy-nine".