621970923 has 8 divisors (see below), whose sum is σ = 947765248. Its totient is φ = 355411944.

The previous prime is 621970903. The next prime is 621970957. The reversal of 621970923 is 329079126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 621970923 - 2¹⁰ = 621969899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621970903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14808811 + ... + 14808852.

It is an arithmetic number, because the mean of its divisors is an integer number (118470656).

Almost surely, 2^621970923 is an apocalyptic number.

621970923 is a deficient number, since it is larger than the sum of its proper divisors (325794325).

621970923 is a wasteful number, since it uses less digits than its factorization.

621970923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29617673.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 621970923 is about 24939.3448791262. The cubic root of 621970923 is about 853.6044962246.

The spelling of 621970923 in words is "six hundred twenty-one million, nine hundred seventy thousand, nine hundred twenty-three".