625038553 has 2 divisors, whose sum is σ = 625038554. Its totient is φ = 625038552.

The previous prime is 625038517. The next prime is 625038559. The reversal of 625038553 is 355830526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553331529 + 71707024 = 23523^2 + 8468^2 .

It is a cyclic number.

It is not a de Polignac number, because 625038553 - 2²¹ = 622941401 is a prime.

It is not a weakly prime, because it can be changed into another prime (625038559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312519276 + 312519277.

It is an arithmetic number, because the mean of its divisors is an integer number (312519277).

Almost surely, 2^625038553 is an apocalyptic number.

It is an amenable number.

625038553 is a deficient number, since it is larger than the sum of its proper divisors (1).

625038553 is an equidigital number, since it uses as much as digits as its factorization.

625038553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 625038553 is about 25000.7710481097. The cubic root of 625038553 is about 855.0055528976.

The spelling of 625038553 in words is "six hundred twenty-five million, thirty-eight thousand, five hundred fifty-three".