626242049 has 2 divisors, whose sum is σ = 626242050. Its totient is φ = 626242048.

The previous prime is 626242027. The next prime is 626242051. The reversal of 626242049 is 940242626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 456591424 + 169650625 = 21368^2 + 13025^2 .

It is a cyclic number.

It is not a de Polignac number, because 626242049 - 2²⁸ = 357806593 is a prime.

It is a Sophie Germain prime.

Together with 626242051, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (626212049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313121024 + 313121025.

It is an arithmetic number, because the mean of its divisors is an integer number (313121025).

Almost surely, 2^626242049 is an apocalyptic number.

It is an amenable number.

626242049 is a deficient number, since it is larger than the sum of its proper divisors (1).

626242049 is an equidigital number, since it uses as much as digits as its factorization.

626242049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 626242049 is about 25024.8286507620. The cubic root of 626242049 is about 855.5539649533.

The spelling of 626242049 in words is "six hundred twenty-six million, two hundred forty-two thousand, forty-nine".