626264281 has 2 divisors, whose sum is σ = 626264282. Its totient is φ = 626264280.

The previous prime is 626264273. The next prime is 626264311. The reversal of 626264281 is 182462626.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 617969881 + 8294400 = 24859^2 + 2880^2 .

It is a cyclic number.

It is not a de Polignac number, because 626264281 - 2³ = 626264273 is a prime.

It is a super-2 number, since 2×626264281² = 784413899312893922, 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 626264281.

It is not a weakly prime, because it can be changed into another prime (626261281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313132140 + 313132141.

It is an arithmetic number, because the mean of its divisors is an integer number (313132141).

Almost surely, 2^626264281 is an apocalyptic number.

It is an amenable number.

626264281 is a deficient number, since it is larger than the sum of its proper divisors (1).

626264281 is an equidigital number, since it uses as much as digits as its factorization.

626264281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 37.

The square root of 626264281 is about 25025.2728456654. The cubic root of 626264281 is about 855.5640890743.

The spelling of 626264281 in words is "six hundred twenty-six million, two hundred sixty-four thousand, two hundred eighty-one".