625697 has 2 divisors, whose sum is σ = 625698. Its totient is φ = 625696.

The previous prime is 625663. The next prime is 625699. The reversal of 625697 is 796526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 625681 + 16 = 791^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 625697 - 2¹⁴ = 609313 is a prime.

Together with 625699, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625697.

It is not a weakly prime, because it can be changed into another prime (625699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312848 + 312849.

It is an arithmetic number, because the mean of its divisors is an integer number (312849).

2⁶²⁵⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

625697 is a deficient number, since it is larger than the sum of its proper divisors (1).

625697 is an equidigital number, since it uses as much as digits as its factorization.

625697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 35.

The square root of 625697 is about 791.0101137154. The cubic root of 625697 is about 85.5305682794.

The spelling of 625697 in words is "six hundred twenty-five thousand, six hundred ninety-seven".