625997 has 2 divisors, whose sum is σ = 625998. Its totient is φ = 625996.

The previous prime is 625979. The next prime is 626009. The reversal of 625997 is 799526.

625997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (625979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376996 + 249001 = 614^2 + 499^2 .

It is a cyclic number.

It is not a de Polignac number, because 625997 - 2¹⁰ = 624973 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 625997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312998 + 312999.

It is an arithmetic number, because the mean of its divisors is an integer number (312999).

2⁶²⁵⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

625997 is a deficient number, since it is larger than the sum of its proper divisors (1).

625997 is an equidigital number, since it uses as much as digits as its factorization.

625997 is an evil number, because the sum of its binary digits is even.

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

The square root of 625997 is about 791.1997219413. The cubic root of 625997 is about 85.5442357418.

The spelling of 625997 in words is "six hundred twenty-five thousand, nine hundred ninety-seven".