621689325 has 12 divisors (see below), whose sum is σ = 1027859808. Its totient is φ = 331567600.

The previous prime is 621689323. The next prime is 621689347. The reversal of 621689325 is 523986126.

It is not a de Polignac number, because 621689325 - 2¹ = 621689323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621689323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4144521 + ... + 4144670.

It is an arithmetic number, because the mean of its divisors is an integer number (85654984).

Almost surely, 2^621689325 is an apocalyptic number.

It is an amenable number.

621689325 is a deficient number, since it is larger than the sum of its proper divisors (406170483).

621689325 is a wasteful number, since it uses less digits than its factorization.

621689325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8289204 (or 8289199 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 621689325 is about 24933.6985824406. The cubic root of 621689325 is about 853.4756533288.

The spelling of 621689325 in words is "six hundred twenty-one million, six hundred eighty-nine thousand, three hundred twenty-five".