626557313 has 2 divisors, whose sum is σ = 626557314. Its totient is φ = 626557312.

The previous prime is 626557279. The next prime is 626557331. The reversal of 626557313 is 313755626.

Together with next prime (626557331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 586463089 + 40094224 = 24217^2 + 6332^2 .

It is a cyclic number.

It is not a de Polignac number, because 626557313 - 2⁶ = 626557249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (626557333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313278656 + 313278657.

It is an arithmetic number, because the mean of its divisors is an integer number (313278657).

Almost surely, 2^626557313 is an apocalyptic number.

It is an amenable number.

626557313 is a deficient number, since it is larger than the sum of its proper divisors (1).

626557313 is an equidigital number, since it uses as much as digits as its factorization.

626557313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 38.

The square root of 626557313 is about 25031.1268823439. The cubic root of 626557313 is about 855.6975090864.

The spelling of 626557313 in words is "six hundred twenty-six million, five hundred fifty-seven thousand, three hundred thirteen".