399957886239 has 4 divisors (see below), whose sum is σ = 533277181656. Its totient is φ = 266638590824.

The previous prime is 399957886231. The next prime is 399957886241. The reversal of 399957886239 is 932688759993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 399957886239 - 2³ = 399957886231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399957886231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66659647704 + ... + 66659647709.

It is an arithmetic number, because the mean of its divisors is an integer number (133319295414).

Almost surely, 2^399957886239 is an apocalyptic number.

399957886239 is a deficient number, since it is larger than the sum of its proper divisors (133319295417).

399957886239 is a wasteful number, since it uses less digits than its factorization.

399957886239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133319295416.

The product of its digits is 1587237120, while the sum is 78.

The spelling of 399957886239 in words is "three hundred ninety-nine billion, nine hundred fifty-seven million, eight hundred eighty-six thousand, two hundred thirty-nine".