626620417 has 2 divisors, whose sum is σ = 626620418. Its totient is φ = 626620416.

The previous prime is 626620387. The next prime is 626620427. The reversal of 626620417 is 714026626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 522396736 + 104223681 = 22856^2 + 10209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-626620417 is a prime.

It is not a weakly prime, because it can be changed into another prime (626620427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313310208 + 313310209.

It is an arithmetic number, because the mean of its divisors is an integer number (313310209).

Almost surely, 2^626620417 is an apocalyptic number.

It is an amenable number.

626620417 is a deficient number, since it is larger than the sum of its proper divisors (1).

626620417 is an equidigital number, since it uses as much as digits as its factorization.

626620417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 626620417 is about 25032.3873611767. The cubic root of 626620417 is about 855.7262354411.

The spelling of 626620417 in words is "six hundred twenty-six million, six hundred twenty thousand, four hundred seventeen".