625643 has 2 divisors, whose sum is σ = 625644. Its totient is φ = 625642.

The previous prime is 625637. The next prime is 625657. The reversal of 625643 is 346526.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 625643 - 2⁴ = 625627 is a prime.

It is a Sophie Germain prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625643.

It is not a weakly prime, because it can be changed into another prime (625663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312821 + 312822.

It is an arithmetic number, because the mean of its divisors is an integer number (312822).

2⁶²⁵⁶⁴³ is an apocalyptic number.

625643 is a deficient number, since it is larger than the sum of its proper divisors (1).

625643 is an equidigital number, since it uses as much as digits as its factorization.

625643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 26.

The square root of 625643 is about 790.9759794077. The cubic root of 625643 is about 85.5281076722.

It can be divided in two parts, 62 and 5643, that multiplied together give a triangular number (349866 = T₈₃₆).

The spelling of 625643 in words is "six hundred twenty-five thousand, six hundred forty-three".