626320417 has 2 divisors, whose sum is σ = 626320418. Its totient is φ = 626320416.

The previous prime is 626320411. The next prime is 626320421. The reversal of 626320417 is 714023626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620956561 + 5363856 = 24919^2 + 2316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-626320417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (626320411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313160208 + 313160209.

It is an arithmetic number, because the mean of its divisors is an integer number (313160209).

Almost surely, 2^626320417 is an apocalyptic number.

It is an amenable number.

626320417 is a deficient number, since it is larger than the sum of its proper divisors (1).

626320417 is an equidigital number, since it uses as much as digits as its factorization.

626320417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 626320417 is about 25026.3944067059. The cubic root of 626320417 is about 855.5896515044.

The spelling of 626320417 in words is "six hundred twenty-six million, three hundred twenty thousand, four hundred seventeen".