399597307 has 8 divisors (see below), whose sum is σ = 401561600. Its totient is φ = 397638504.

The previous prime is 399597287. The next prime is 399597329. The reversal of 399597307 is 703795993.

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

It is a cyclic number.

It is not a de Polignac number, because 399597307 - 2¹⁹ = 399073019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399597907) 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, 226294 + ... + 228052.

It is an arithmetic number, because the mean of its divisors is an integer number (50195200).

Almost surely, 2^399597307 is an apocalyptic number.

399597307 is a deficient number, since it is larger than the sum of its proper divisors (1964293).

399597307 is a wasteful number, since it uses less digits than its factorization.

399597307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745.

The product of its (nonzero) digits is 1607445, while the sum is 52.

The square root of 399597307 is about 19989.9301399480. The cubic root of 399597307 is about 736.5589610922.

The spelling of 399597307 in words is "three hundred ninety-nine million, five hundred ninety-seven thousand, three hundred seven".