626204993 has 2 divisors, whose sum is σ = 626204994. Its totient is φ = 626204992.

The previous prime is 626204989. The next prime is 626205011. The reversal of 626204993 is 399402626.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380562064 + 245642929 = 19508^2 + 15673^2 .

It is a cyclic number.

It is not a de Polignac number, because 626204993 - 2² = 626204989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 626204993.

It is not a weakly prime, because it can be changed into another prime (626204903) 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, 313102496 + 313102497.

It is an arithmetic number, because the mean of its divisors is an integer number (313102497).

Almost surely, 2^626204993 is an apocalyptic number.

It is an amenable number.

626204993 is a deficient number, since it is larger than the sum of its proper divisors (1).

626204993 is an equidigital number, since it uses as much as digits as its factorization.

626204993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 626204993 is about 25024.0882551193. The cubic root of 626204993 is about 855.5370896716.

The spelling of 626204993 in words is "six hundred twenty-six million, two hundred four thousand, nine hundred ninety-three".