397863595117 has 4 divisors (see below), whose sum is σ = 415162012320. Its totient is φ = 380565177916.

The previous prime is 397863595109. The next prime is 397863595139. The reversal of 397863595117 is 711595368793.

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, and also an emirpimes, since its reverse is a distinct semiprime: 711595368793 = 71 ⋅10022469983.

It is a cyclic number.

It is not a de Polignac number, because 397863595117 - 2³ = 397863595109 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 (397863598117) 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, 8649208567 + ... + 8649208612.

It is an arithmetic number, because the mean of its divisors is an integer number (103790503080).

Almost surely, 2^397863595117 is an apocalyptic number.

It is an amenable number.

397863595117 is a deficient number, since it is larger than the sum of its proper divisors (17298417203).

397863595117 is a wasteful number, since it uses less digits than its factorization.

397863595117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17298417202.

The product of its digits is 42865200, while the sum is 64.

The spelling of 397863595117 in words is "three hundred ninety-seven billion, eight hundred sixty-three million, five hundred ninety-five thousand, one hundred seventeen".