626445313 has 6 divisors (see below), whose sum is σ = 678340374. Its totient is φ = 578257056.

The previous prime is 626445263. The next prime is 626445331. The reversal of 626445313 is 313544626.

It can be written as a sum of positive squares in 3 ways, for example, as 53465344 + 572979969 = 7312^2 + 23937^2 .

It is a de Polignac number, because none of the positive numbers 2^k-626445313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (626445353) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1853220 + ... + 1853557.

It is an arithmetic number, because the mean of its divisors is an integer number (113056729).

Almost surely, 2^626445313 is an apocalyptic number.

It is an amenable number.

626445313 is a deficient number, since it is larger than the sum of its proper divisors (51895061).

626445313 is a wasteful number, since it uses less digits than its factorization.

626445313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3706803 (or 3706790 counting only the distinct ones).

The product of its digits is 51840, while the sum is 34.

The square root of 626445313 is about 25028.8895678574. The cubic root of 626445313 is about 855.6465194269.

Adding to 626445313 its reverse (313544626), we get a palindrome (939989939).

The spelling of 626445313 in words is "six hundred twenty-six million, four hundred forty-five thousand, three hundred thirteen".