399097925 has 12 divisors (see below), whose sum is σ = 498038436. Its totient is φ = 317241600.

The previous prime is 399097901. The next prime is 399097939. The reversal of 399097925 is 529790993.

It can be written as a sum of positive squares in 6 ways, for example, as 41396356 + 357701569 = 6434^2 + 18913^2 .

It is not a de Polignac number, because 399097925 - 2¹⁴ = 399081541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46916 + ... + 54765.

It is an arithmetic number, because the mean of its divisors is an integer number (41503203).

Almost surely, 2^399097925 is an apocalyptic number.

It is an amenable number.

399097925 is a deficient number, since it is larger than the sum of its proper divisors (98940511).

399097925 is a wasteful number, since it uses less digits than its factorization.

399097925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101848 (or 101843 counting only the distinct ones).

The product of its (nonzero) digits is 1377810, while the sum is 53.

The square root of 399097925 is about 19977.4353959661. The cubic root of 399097925 is about 736.2520040531.

The spelling of 399097925 in words is "three hundred ninety-nine million, ninety-seven thousand, nine hundred twenty-five".