396847971 has 16 divisors (see below), whose sum is σ = 633148320. Its totient is φ = 244213920.

The previous prime is 396847967. The next prime is 396847973. The reversal of 396847971 is 179748693.

It is a happy number.

It is not a de Polignac number, because 396847971 - 2² = 396847967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (396847973) 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, 564960 + ... + 565661.

It is an arithmetic number, because the mean of its divisors is an integer number (39571770).

Almost surely, 2^396847971 is an apocalyptic number.

396847971 is a deficient number, since it is larger than the sum of its proper divisors (236300349).

396847971 is a wasteful number, since it uses less digits than its factorization.

396847971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130643 (or 1130637 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 396847971 is about 19921.0434214677. The cubic root of 396847971 is about 734.8658314034.

The spelling of 396847971 in words is "three hundred ninety-six million, eight hundred forty-seven thousand, nine hundred seventy-one".