399297788263 has 4 divisors (see below), whose sum is σ = 435597587208. Its totient is φ = 362997989320.

The previous prime is 399297788237. The next prime is 399297788291. The reversal of 399297788263 is 362887792993.

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 399297788263 - 2⁵ = 399297788231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399297788293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18149899456 + ... + 18149899477.

It is an arithmetic number, because the mean of its divisors is an integer number (108899396802).

Almost surely, 2^399297788263 is an apocalyptic number.

399297788263 is a deficient number, since it is larger than the sum of its proper divisors (36299798945).

399297788263 is a wasteful number, since it uses less digits than its factorization.

399297788263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36299798944.

The product of its digits is 493807104, while the sum is 73.

The spelling of 399297788263 in words is "three hundred ninety-nine billion, two hundred ninety-seven million, seven hundred eighty-eight thousand, two hundred sixty-three".