625088021 has 2 divisors, whose sum is σ = 625088022. Its totient is φ = 625088020.

The previous prime is 625087961. The next prime is 625088039. The reversal of 625088021 is 120880526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 482285521 + 142802500 = 21961^2 + 11950^2 .

It is a cyclic number.

It is not a de Polignac number, because 625088021 - 2¹⁰ = 625086997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625088041) 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, 312544010 + 312544011.

It is an arithmetic number, because the mean of its divisors is an integer number (312544011).

Almost surely, 2^625088021 is an apocalyptic number.

It is an amenable number.

625088021 is a deficient number, since it is larger than the sum of its proper divisors (1).

625088021 is an equidigital number, since it uses as much as digits as its factorization.

625088021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 625088021 is about 25001.7603580228. The cubic root of 625088021 is about 855.0281084657.

The spelling of 625088021 in words is "six hundred twenty-five million, eighty-eight thousand, twenty-one".