626245513 has 2 divisors, whose sum is σ = 626245514. Its totient is φ = 626245512.

The previous prime is 626245493. The next prime is 626245519. The reversal of 626245513 is 315542626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331676944 + 294568569 = 18212^2 + 17163^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-626245513 is a prime.

It is not a weakly prime, because it can be changed into another prime (626245519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313122756 + 313122757.

It is an arithmetic number, because the mean of its divisors is an integer number (313122757).

Almost surely, 2^626245513 is an apocalyptic number.

It is an amenable number.

626245513 is a deficient number, since it is larger than the sum of its proper divisors (1).

626245513 is an equidigital number, since it uses as much as digits as its factorization.

626245513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 34.

The square root of 626245513 is about 25024.8978619294. The cubic root of 626245513 is about 855.5555424230. Note that the first 4 decimals are identical.

The spelling of 626245513 in words is "six hundred twenty-six million, two hundred forty-five thousand, five hundred thirteen".