397679247 has 24 divisors (see below), whose sum is σ = 685345200. Its totient is φ = 227244528.

The previous prime is 397679239. The next prime is 397679251. The reversal of 397679247 is 742976793.

397679247 is a `hidden beast` number, since 397 + 6 + 7 + 9 + 247 = 666.

It is not a de Polignac number, because 397679247 - 2³ = 397679239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397679193 and 397679202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397679287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148972 + ... + 151617.

It is an arithmetic number, because the mean of its divisors is an integer number (28556050).

Almost surely, 2^397679247 is an apocalyptic number.

397679247 is a deficient number, since it is larger than the sum of its proper divisors (287665953).

397679247 is a wasteful number, since it uses less digits than its factorization.

397679247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300612 (or 300599 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 54.

The square root of 397679247 is about 19941.8967753822. The cubic root of 397679247 is about 735.3785804792.

The spelling of 397679247 in words is "three hundred ninety-seven million, six hundred seventy-nine thousand, two hundred forty-seven".