625922909 has 4 divisors (see below), whose sum is σ = 658866240. Its totient is φ = 592979580.

The previous prime is 625922893. The next prime is 625922939. The reversal of 625922909 is 909229526.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 625922909 - 2⁴ = 625922893 is a prime.

It is a super-2 number, since 2×625922909² = 783558976022044562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 625922909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625922939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16471637 + ... + 16471674.

It is an arithmetic number, because the mean of its divisors is an integer number (164716560).

Almost surely, 2^625922909 is an apocalyptic number.

It is an amenable number.

625922909 is a deficient number, since it is larger than the sum of its proper divisors (32943331).

625922909 is a wasteful number, since it uses less digits than its factorization.

625922909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32943330.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 625922909 is about 25018.4513709382. The cubic root of 625922909 is about 855.4086069470.

The spelling of 625922909 in words is "six hundred twenty-five million, nine hundred twenty-two thousand, nine hundred nine".