397599729 has 8 divisors (see below), whose sum is σ = 530248992. Its totient is φ = 265008480.

The previous prime is 397599703. The next prime is 397599733. The reversal of 397599729 is 927995793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397599729 - 2⁸ = 397599473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397599739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5389 + ... + 28709.

It is an arithmetic number, because the mean of its divisors is an integer number (66281124).

Almost surely, 2^397599729 is an apocalyptic number.

It is an amenable number.

397599729 is a deficient number, since it is larger than the sum of its proper divisors (132649263).

397599729 is a wasteful number, since it uses less digits than its factorization.

397599729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29007.

The product of its digits is 9644670, while the sum is 60.

The square root of 397599729 is about 19939.9029335651. The cubic root of 397599729 is about 735.3295629755.

The spelling of 397599729 in words is "three hundred ninety-seven million, five hundred ninety-nine thousand, seven hundred twenty-nine".