626335421 has 2 divisors, whose sum is σ = 626335422. Its totient is φ = 626335420.

The previous prime is 626335349. The next prime is 626335429. The reversal of 626335421 is 124533626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541492900 + 84842521 = 23270^2 + 9211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-626335421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (626335429) 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, 313167710 + 313167711.

It is an arithmetic number, because the mean of its divisors is an integer number (313167711).

Almost surely, 2^626335421 is an apocalyptic number.

It is an amenable number.

626335421 is a deficient number, since it is larger than the sum of its proper divisors (1).

626335421 is an equidigital number, since it uses as much as digits as its factorization.

626335421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 32.

The square root of 626335421 is about 25026.6941684274. The cubic root of 626335421 is about 855.5964835583.

The spelling of 626335421 in words is "six hundred twenty-six million, three hundred thirty-five thousand, four hundred twenty-one".