397159665 has 32 divisors (see below), whose sum is σ = 745870080. Its totient is φ = 176649984.

The previous prime is 397159601. The next prime is 397159673. The reversal of 397159665 is 566951793.

It is not a de Polignac number, because 397159665 - 2⁶ = 397159601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47230 + ... + 54999.

It is an arithmetic number, because the mean of its divisors is an integer number (23308440).

Almost surely, 2^397159665 is an apocalyptic number.

397159665 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

397159665 is a deficient number, since it is larger than the sum of its proper divisors (348710415).

397159665 is a wasteful number, since it uses less digits than its factorization.

397159665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102281.

The product of its digits is 1530900, while the sum is 51.

The square root of 397159665 is about 19928.8651207238. The cubic root of 397159665 is about 735.0581748576.

It can be divided in two parts, 3971 and 59665, that added together give a palindrome (63636).

The spelling of 397159665 in words is "three hundred ninety-seven million, one hundred fifty-nine thousand, six hundred sixty-five".