399497233 has 16 divisors (see below), whose sum is σ = 412231680. Its totient is φ = 387041616.

The previous prime is 399497221. The next prime is 399497239. The reversal of 399497233 is 332794993.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399497233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399497239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1411510 + ... + 1411792.

It is an arithmetic number, because the mean of its divisors is an integer number (25764480).

Almost surely, 2^399497233 is an apocalyptic number.

It is an amenable number.

399497233 is a deficient number, since it is larger than the sum of its proper divisors (12734447).

399497233 is a wasteful number, since it uses less digits than its factorization.

399497233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its digits is 1102248, while the sum is 49.

The square root of 399497233 is about 19987.4268729119. The cubic root of 399497233 is about 736.4974687228.

The spelling of 399497233 in words is "three hundred ninety-nine million, four hundred ninety-seven thousand, two hundred thirty-three".