399113745 has 32 divisors (see below), whose sum is σ = 659653632. Its totient is φ = 205931712.

The previous prime is 399113731. The next prime is 399113761. The reversal of 399113745 is 547311993.

It is not a de Polignac number, because 399113745 - 2⁵ = 399113713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399113697 and 399113706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66124 + ... + 71906.

It is an arithmetic number, because the mean of its divisors is an integer number (20614176).

Almost surely, 2^399113745 is an apocalyptic number.

It is an amenable number.

399113745 is a deficient number, since it is larger than the sum of its proper divisors (260539887).

399113745 is a wasteful number, since it uses less digits than its factorization.

399113745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5941.

The product of its digits is 102060, while the sum is 42.

The square root of 399113745 is about 19977.8313387615. The cubic root of 399113745 is about 736.2617321191.

The spelling of 399113745 in words is "three hundred ninety-nine million, one hundred thirteen thousand, seven hundred forty-five".