864207399 has 16 divisors (see below), whose sum is σ = 1258354944. Its totient is φ = 523209600.

The previous prime is 864207373. The next prime is 864207401. The reversal of 864207399 is 993702468.

It is not a de Polignac number, because 864207399 - 2⁷ = 864207271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864207319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19119 + ... + 45759.

It is an arithmetic number, because the mean of its divisors is an integer number (78647184).

Almost surely, 2^864207399 is an apocalyptic number.

864207399 is a deficient number, since it is larger than the sum of its proper divisors (394147545).

864207399 is a wasteful number, since it uses less digits than its factorization.

864207399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27638.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 864207399 is about 29397.4046303411. The cubic root of 864207399 is about 952.5168346650.

The spelling of 864207399 in words is "eight hundred sixty-four million, two hundred seven thousand, three hundred ninety-nine".