625663 has 2 divisors, whose sum is σ = 625664. Its totient is φ = 625662.

The previous prime is 625661. The next prime is 625697. The reversal of 625663 is 366526.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 625663 - 2¹ = 625661 is a prime.

Together with 625661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312831 + 312832.

It is an arithmetic number, because the mean of its divisors is an integer number (312832).

2⁶²⁵⁶⁶³ is an apocalyptic number.

625663 is a deficient number, since it is larger than the sum of its proper divisors (1).

625663 is an equidigital number, since it uses as much as digits as its factorization.

625663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 28.

The square root of 625663 is about 790.9886219156. The cubic root of 625663 is about 85.5290190247.

The spelling of 625663 in words is "six hundred twenty-five thousand, six hundred sixty-three".