399051263 has 16 divisors (see below), whose sum is σ = 437584896. Its totient is φ = 361674720.

The previous prime is 399051259. The next prime is 399051287. The reversal of 399051263 is 362150993.

It is a cyclic number.

It is not a de Polignac number, because 399051263 - 2² = 399051259 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 (399051293) 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, 374870 + ... + 375932.

It is an arithmetic number, because the mean of its divisors is an integer number (27349056).

Almost surely, 2^399051263 is an apocalyptic number.

399051263 is a deficient number, since it is larger than the sum of its proper divisors (38533633).

399051263 is a wasteful number, since it uses less digits than its factorization.

399051263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 399051263 is about 19976.2674942042. The cubic root of 399051263 is about 736.2233090655.

The spelling of 399051263 in words is "three hundred ninety-nine million, fifty-one thousand, two hundred sixty-three".