625971967 has 4 divisors (see below), whose sum is σ = 658917880. Its totient is φ = 593026056.

The previous prime is 625971961. The next prime is 625971971. The reversal of 625971967 is 769179526.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 625971967 - 2³ = 625971959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625971961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16472928 + ... + 16472965.

It is an arithmetic number, because the mean of its divisors is an integer number (164729470).

Almost surely, 2^625971967 is an apocalyptic number.

625971967 is a deficient number, since it is larger than the sum of its proper divisors (32945913).

625971967 is a wasteful number, since it uses less digits than its factorization.

625971967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32945912.

The product of its digits is 1428840, while the sum is 52.

The square root of 625971967 is about 25019.4317881122. The cubic root of 625971967 is about 855.4309545016.

The spelling of 625971967 in words is "six hundred twenty-five million, nine hundred seventy-one thousand, nine hundred sixty-seven".