625542889 has 2 divisors, whose sum is σ = 625542890. Its totient is φ = 625542888.

The previous prime is 625542859. The next prime is 625542977. The reversal of 625542889 is 988245526.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427662400 + 197880489 = 20680^2 + 14067^2 .

It is a cyclic number.

It is not a de Polignac number, because 625542889 - 2⁵ = 625542857 is a prime.

It is not a weakly prime, because it can be changed into another prime (625542859) 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, 312771444 + 312771445.

It is an arithmetic number, because the mean of its divisors is an integer number (312771445).

Almost surely, 2^625542889 is an apocalyptic number.

It is an amenable number.

625542889 is a deficient number, since it is larger than the sum of its proper divisors (1).

625542889 is an equidigital number, since it uses as much as digits as its factorization.

625542889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 49.

The square root of 625542889 is about 25010.8554231957. The cubic root of 625542889 is about 855.2354555978.

The spelling of 625542889 in words is "six hundred twenty-five million, five hundred forty-two thousand, eight hundred eighty-nine".