397807976925 has 96 divisors (see below), whose sum is σ = 737246146560. Its totient is φ = 210292588800.

The previous prime is 397807976911. The next prime is 397807976933. The reversal of 397807976925 is 529679708793.

397807976925 is a `hidden beast` number, since 397 + 80 + 7 + 9 + 76 + 92 + 5 = 666.

It is not a de Polignac number, because 397807976925 - 2⁹ = 397807976413 is a prime.

It is a super-2 number, since 2×397807976925² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 145131055 + ... + 145133795.

It is an arithmetic number, because the mean of its divisors is an integer number (7679647360).

Almost surely, 2^397807976925 is an apocalyptic number.

It is an amenable number.

397807976925 is a deficient number, since it is larger than the sum of its proper divisors (339438169635).

397807976925 is a wasteful number, since it uses less digits than its factorization.

397807976925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580 (or 4569 counting only the distinct ones).

The product of its (nonzero) digits is 360067680, while the sum is 72.

The spelling of 397807976925 in words is "three hundred ninety-seven billion, eight hundred seven million, nine hundred seventy-six thousand, nine hundred twenty-five".