621102137 has 2 divisors, whose sum is σ = 621102138. Its totient is φ = 621102136.

The previous prime is 621102059. The next prime is 621102169. The reversal of 621102137 is 731201126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399360256 + 221741881 = 19984^2 + 14891^2 .

It is a cyclic number.

It is not a de Polignac number, because 621102137 - 2¹⁸ = 620839993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (621102037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310551068 + 310551069.

It is an arithmetic number, because the mean of its divisors is an integer number (310551069).

Almost surely, 2^621102137 is an apocalyptic number.

It is an amenable number.

621102137 is a deficient number, since it is larger than the sum of its proper divisors (1).

621102137 is an equidigital number, since it uses as much as digits as its factorization.

621102137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 621102137 is about 24921.9208128106. The cubic root of 621102137 is about 853.2068649891.

The spelling of 621102137 in words is "six hundred twenty-one million, one hundred two thousand, one hundred thirty-seven".