621970959 has 32 divisors (see below), whose sum is σ = 893168640. Its totient is φ = 383611392.

The previous prime is 621970957. The next prime is 621970967. The reversal of 621970959 is 959079126.

It is not a de Polignac number, because 621970959 - 2¹ = 621970957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621970957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 876897 + ... + 877605.

It is an arithmetic number, because the mean of its divisors is an integer number (27911520).

Almost surely, 2^621970959 is an apocalyptic number.

621970959 is a deficient number, since it is larger than the sum of its proper divisors (271197681).

621970959 is a wasteful number, since it uses less digits than its factorization.

621970959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999.

The product of its (nonzero) digits is 306180, while the sum is 48.

The square root of 621970959 is about 24939.3456008773. The cubic root of 621970959 is about 853.6045126936.

The spelling of 621970959 in words is "six hundred twenty-one million, nine hundred seventy thousand, nine hundred fifty-nine".