626623 has 2 divisors, whose sum is σ = 626624. Its totient is φ = 626622.

The previous prime is 626621. The next prime is 626627. The reversal of 626623 is 326626.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 626623 - 2¹ = 626621 is a prime.

Together with 626621, it forms a pair of twin primes.

626623 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (626621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313311 + 313312.

It is an arithmetic number, because the mean of its divisors is an integer number (313312).

2⁶²⁶⁶²³ is an apocalyptic number.

626623 is a deficient number, since it is larger than the sum of its proper divisors (1).

626623 is an equidigital number, since it uses as much as digits as its factorization.

626623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

The square root of 626623 is about 791.5952248466. The cubic root of 626623 is about 85.5727411239.

The spelling of 626623 in words is "six hundred twenty-six thousand, six hundred twenty-three".