626242457 has 2 divisors, whose sum is σ = 626242458. Its totient is φ = 626242456.

The previous prime is 626242433. The next prime is 626242469. The reversal of 626242457 is 754242626.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 625200016 + 1042441 = 25004^2 + 1021^2 .

It is a cyclic number.

It is not a de Polignac number, because 626242457 - 2²² = 622048153 is a prime.

It is a super-2 number, since 2×626242457² = 784359229898793698, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 626242457.

It is not a weakly prime, because it can be changed into another prime (626242417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313121228 + 313121229.

It is an arithmetic number, because the mean of its divisors is an integer number (313121229).

Almost surely, 2^626242457 is an apocalyptic number.

It is an amenable number.

626242457 is a deficient number, since it is larger than the sum of its proper divisors (1).

626242457 is an equidigital number, since it uses as much as digits as its factorization.

626242457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 38.

The square root of 626242457 is about 25024.8368026647. The cubic root of 626242457 is about 855.5541507526.

The spelling of 626242457 in words is "six hundred twenty-six million, two hundred forty-two thousand, four hundred fifty-seven".