625979 has 2 divisors, whose sum is σ = 625980. Its totient is φ = 625978.

The previous prime is 625969. The next prime is 625997. The reversal of 625979 is 979526.

Together with next prime (625997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 625979 - 2¹² = 621883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (625909) 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 as a sum of consecutive naturals, namely, 312989 + 312990.

It is an arithmetic number, because the mean of its divisors is an integer number (312990).

2⁶²⁵⁹⁷⁹ is an apocalyptic number.

625979 is a deficient number, since it is larger than the sum of its proper divisors (1).

625979 is an equidigital number, since it uses as much as digits as its factorization.

625979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 38.

The square root of 625979 is about 791.1883467291. The cubic root of 625979 is about 85.5434158172.

The spelling of 625979 in words is "six hundred twenty-five thousand, nine hundred seventy-nine".