399462793 has 4 divisors (see below), whose sum is σ = 402007300. Its totient is φ = 396918288.

The previous prime is 399462761. The next prime is 399462803. The reversal of 399462793 is 397264993.

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

It can be written as a sum of positive squares in 2 ways, for example, as 304048969 + 95413824 = 17437^2 + 9768^2 .

It is a cyclic number.

It is not a de Polignac number, because 399462793 - 2⁵ = 399462761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 399462793.

It is not an unprimeable number, because it can be changed into a prime (399462703) 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, 1272018 + ... + 1272331.

It is an arithmetic number, because the mean of its divisors is an integer number (100501825).

Almost surely, 2^399462793 is an apocalyptic number.

It is an amenable number.

399462793 is a deficient number, since it is larger than the sum of its proper divisors (2544507).

399462793 is a wasteful number, since it uses less digits than its factorization.

399462793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544506.

The product of its digits is 2204496, while the sum is 52.

The square root of 399462793 is about 19986.5653127294. The cubic root of 399462793 is about 736.4763040357.

The spelling of 399462793 in words is "three hundred ninety-nine million, four hundred sixty-two thousand, seven hundred ninety-three".