626464009 has 2 divisors, whose sum is σ = 626464010. Its totient is φ = 626464008.

The previous prime is 626464001. The next prime is 626464049. The reversal of 626464009 is 900464626.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 350737984 + 275726025 = 18728^2 + 16605^2 .

It is a cyclic number.

It is not a de Polignac number, because 626464009 - 2³ = 626464001 is a prime.

It is not a weakly prime, because it can be changed into another prime (626464001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313232004 + 313232005.

It is an arithmetic number, because the mean of its divisors is an integer number (313232005).

Almost surely, 2^626464009 is an apocalyptic number.

It is an amenable number.

626464009 is a deficient number, since it is larger than the sum of its proper divisors (1).

626464009 is an equidigital number, since it uses as much as digits as its factorization.

626464009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 626464009 is about 25029.2630534740. The cubic root of 626464009 is about 855.6550314805.

The spelling of 626464009 in words is "six hundred twenty-six million, four hundred sixty-four thousand, nine".