399773247925 has 6 divisors (see below), whose sum is σ = 495718827458. Its totient is φ = 319818598320.

The previous prime is 399773247917. The next prime is 399773247931. The reversal of 399773247925 is 529742377993.

It can be written as a sum of positive squares in 3 ways, for example, as 118760876689 + 281012371236 = 344617^2 + 530106^2 .

It is not a de Polignac number, because 399773247925 - 2³ = 399773247917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7995464934 + ... + 7995464983.

Almost surely, 2^399773247925 is an apocalyptic number.

It is an amenable number.

399773247925 is a deficient number, since it is larger than the sum of its proper divisors (95945579533).

399773247925 is a wasteful number, since it uses less digits than its factorization.

399773247925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15990929927 (or 15990929922 counting only the distinct ones).

The product of its digits is 180033840, while the sum is 67.

The spelling of 399773247925 in words is "three hundred ninety-nine billion, seven hundred seventy-three million, two hundred forty-seven thousand, nine hundred twenty-five".