396925621 has 4 divisors (see below), whose sum is σ = 402849952. Its totient is φ = 391001292.

The previous prime is 396925619. The next prime is 396925663. The reversal of 396925621 is 126529693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 396925621 - 2¹ = 396925619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396925681) 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, 2962065 + ... + 2962198.

It is an arithmetic number, because the mean of its divisors is an integer number (100712488).

Almost surely, 2^396925621 is an apocalyptic number.

It is an amenable number.

396925621 is a deficient number, since it is larger than the sum of its proper divisors (5924331).

396925621 is an equidigital number, since it uses as much as digits as its factorization.

396925621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5924330.

The product of its digits is 174960, while the sum is 43.

The square root of 396925621 is about 19922.9922702389. The cubic root of 396925621 is about 734.9137579098.

The spelling of 396925621 in words is "three hundred ninety-six million, nine hundred twenty-five thousand, six hundred twenty-one".