625668923 has 8 divisors (see below), whose sum is σ = 684704880. Its totient is φ = 566992480.

The previous prime is 625668919. The next prime is 625668947. The reversal of 625668923 is 329866526.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 625668923 - 2² = 625668919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625668973) 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 7 ways as a sum of consecutive naturals, for example, 86228 + ... + 93201.

It is an arithmetic number, because the mean of its divisors is an integer number (85588110).

Almost surely, 2^625668923 is an apocalyptic number.

625668923 is a deficient number, since it is larger than the sum of its proper divisors (59035957).

625668923 is a wasteful number, since it uses less digits than its factorization.

625668923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179757.

The product of its digits is 933120, while the sum is 47.

The square root of 625668923 is about 25013.3748822505. The cubic root of 625668923 is about 855.2928891801.

The spelling of 625668923 in words is "six hundred twenty-five million, six hundred sixty-eight thousand, nine hundred twenty-three".