626790551 has 2 divisors, whose sum is σ = 626790552. Its totient is φ = 626790550.

The previous prime is 626790533. The next prime is 626790553. The reversal of 626790551 is 155097626.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-626790551 is a prime.

It is a Sophie Germain prime.

Together with 626790553, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_32648657 and since 626790551 and 32648657 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 626790499 and 626790508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (626790553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313395275 + 313395276.

It is an arithmetic number, because the mean of its divisors is an integer number (313395276).

Almost surely, 2^626790551 is an apocalyptic number.

626790551 is a deficient number, since it is larger than the sum of its proper divisors (1).

626790551 is an equidigital number, since it uses as much as digits as its factorization.

626790551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 626790551 is about 25035.7854080914. The cubic root of 626790551 is about 855.8036746420.

The spelling of 626790551 in words is "six hundred twenty-six million, seven hundred ninety thousand, five hundred fifty-one".