621124057 has 2 divisors, whose sum is σ = 621124058. Its totient is φ = 621124056.

The previous prime is 621124037. The next prime is 621124067. The reversal of 621124057 is 750421126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 617969881 + 3154176 = 24859^2 + 1776^2 .

It is a cyclic number.

It is not a de Polignac number, because 621124057 - 2⁷ = 621123929 is a prime.

It is not a weakly prime, because it can be changed into another prime (621124027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310562028 + 310562029.

It is an arithmetic number, because the mean of its divisors is an integer number (310562029).

Almost surely, 2^621124057 is an apocalyptic number.

It is an amenable number.

621124057 is a deficient number, since it is larger than the sum of its proper divisors (1).

621124057 is an equidigital number, since it uses as much as digits as its factorization.

621124057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 621124057 is about 24922.3605824167. The cubic root of 621124057 is about 853.2169020256.

The spelling of 621124057 in words is "six hundred twenty-one million, one hundred twenty-four thousand, fifty-seven".