625608538 has 4 divisors (see below), whose sum is σ = 938412810. Its totient is φ = 312804268.

The previous prime is 625608523. The next prime is 625608539. The reversal of 625608538 is 835806526.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 609744249 + 15864289 = 24693^2 + 3983^2 .

It is a junction number, because it is equal to n+sod(n) for n = 625608494 and 625608503.

It is not an unprimeable number, because it can be changed into a prime (625608539) 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, 156402133 + ... + 156402136.

Almost surely, 2^625608538 is an apocalyptic number.

625608538 is a deficient number, since it is larger than the sum of its proper divisors (312804272).

625608538 is a wasteful number, since it uses less digits than its factorization.

625608538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312804271.

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 625608538 is about 25012.1677988934. The cubic root of 625608538 is about 855.2653727515.

The spelling of 625608538 in words is "six hundred twenty-five million, six hundred eight thousand, five hundred thirty-eight".