397607665 has 16 divisors (see below), whose sum is σ = 587236608. Its totient is φ = 251672256.

The previous prime is 397607659. The next prime is 397607671. The reversal of 397607665 is 566706793.

It is an interprime number because it is at equal distance from previous prime (397607659) and next prime (397607671).

It is a cyclic number.

It is not a de Polignac number, because 397607665 - 2³ = 397607657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436477 + ... + 437386.

It is an arithmetic number, because the mean of its divisors is an integer number (36702288).

Almost surely, 2^397607665 is an apocalyptic number.

397607665 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

397607665 is a deficient number, since it is larger than the sum of its proper divisors (189628943).

397607665 is a wasteful number, since it uses less digits than its factorization.

397607665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873888.

The product of its (nonzero) digits is 1428840, while the sum is 49.

The square root of 397607665 is about 19940.1019305318. The cubic root of 397607665 is about 735.3344552798.

The spelling of 397607665 in words is "three hundred ninety-seven million, six hundred seven thousand, six hundred sixty-five".