625579 has 4 divisors (see below), whose sum is σ = 634984. Its totient is φ = 616176.

The previous prime is 625543. The next prime is 625589. The reversal of 625579 is 975526.

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 625579 - 2⁷ = 625451 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (625529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4602 + ... + 4735.

It is an arithmetic number, because the mean of its divisors is an integer number (158746).

2⁶²⁵⁵⁷⁹ is an apocalyptic number.

625579 is a deficient number, since it is larger than the sum of its proper divisors (9405).

625579 is an equidigital number, since it uses as much as digits as its factorization.

625579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9404.

The product of its digits is 18900, while the sum is 34.

The square root of 625579 is about 790.9355220244. The cubic root of 625579 is about 85.5251912137.

The spelling of 625579 in words is "six hundred twenty-five thousand, five hundred seventy-nine".