396931969 has 4 divisors (see below), whose sum is σ = 453636544. Its totient is φ = 340227396.

The previous prime is 396931957. The next prime is 396931981. The reversal of 396931969 is 969139693.

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: 969139693 = 1213 ⋅798961.

It is an interprime number because it is at equal distance from previous prime (396931957) and next prime (396931981).

It is a cyclic number.

It is not a de Polignac number, because 396931969 - 2⁵ = 396931937 is a prime.

It is a super-2 number, since 2×396931969² = 315109976028433922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396931939) 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, 28352277 + ... + 28352290.

It is an arithmetic number, because the mean of its divisors is an integer number (113409136).

Almost surely, 2^396931969 is an apocalyptic number.

It is an amenable number.

396931969 is a deficient number, since it is larger than the sum of its proper divisors (56704575).

396931969 is an equidigital number, since it uses as much as digits as its factorization.

396931969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56704574.

The product of its digits is 2125764, while the sum is 55.

The square root of 396931969 is about 19923.1515830202. The cubic root of 396931969 is about 734.9176756948.

The spelling of 396931969 in words is "three hundred ninety-six million, nine hundred thirty-one thousand, nine hundred sixty-nine".