621074131 has 2 divisors, whose sum is σ = 621074132. Its totient is φ = 621074130.

The previous prime is 621074089. The next prime is 621074137. The reversal of 621074131 is 131470126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621074131 - 2⁹ = 621073619 is a prime.

It is a super-2 number, since 2×621074131² = 771466152394810322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 621074096 and 621074105.

It is not a weakly prime, because it can be changed into another prime (621074137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310537065 + 310537066.

It is an arithmetic number, because the mean of its divisors is an integer number (310537066).

Almost surely, 2^621074131 is an apocalyptic number.

621074131 is a deficient number, since it is larger than the sum of its proper divisors (1).

621074131 is an equidigital number, since it uses as much as digits as its factorization.

621074131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 621074131 is about 24921.3589316474. The cubic root of 621074131 is about 853.1940408661.

The spelling of 621074131 in words is "six hundred twenty-one million, seventy-four thousand, one hundred thirty-one".