625688889 has 24 divisors (see below), whose sum is σ = 974125440. Its totient is φ = 356184864.

The previous prime is 625688887. The next prime is 625688909. The reversal of 625688889 is 988886526.

It is not a de Polignac number, because 625688889 - 2¹ = 625688887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (625688887) 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 in 23 ways as a sum of consecutive naturals, for example, 31632 + ... + 47454.

It is an arithmetic number, because the mean of its divisors is an integer number (40588560).

Almost surely, 2^625688889 is an apocalyptic number.

It is an amenable number.

625688889 is a deficient number, since it is larger than the sum of its proper divisors (348436551).

625688889 is a wasteful number, since it uses less digits than its factorization.

625688889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16109 (or 16102 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 60.

The square root of 625688889 is about 25013.7739855464. The cubic root of 625688889 is about 855.3019869610.

The spelling of 625688889 in words is "six hundred twenty-five million, six hundred eighty-eight thousand, eight hundred eighty-nine".