626629 has 2 divisors, whose sum is σ = 626630. Its totient is φ = 626628.

The previous prime is 626627. The next prime is 626663. The reversal of 626629 is 926626.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 616225 + 10404 = 785^2 + 102^2 .

It is a cyclic number.

It is not a de Polignac number, because 626629 - 2¹ = 626627 is a prime.

Together with 626627, it forms a pair of twin primes.

It is a Chen prime.

626629 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 626629.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313314 + 313315.

It is an arithmetic number, because the mean of its divisors is an integer number (313315).

2⁶²⁶⁶²⁹ is an apocalyptic number.

It is an amenable number.

626629 is a deficient number, since it is larger than the sum of its proper divisors (1).

626629 is an equidigital number, since it uses as much as digits as its factorization.

626629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 626629 is about 791.5990146533. The cubic root of 626629 is about 85.5730142466.

The spelling of 626629 in words is "six hundred twenty-six thousand, six hundred twenty-nine".