626708969 has 2 divisors, whose sum is σ = 626708970. Its totient is φ = 626708968.

The previous prime is 626708947. The next prime is 626708983. The reversal of 626708969 is 969807626.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 552955225 + 73753744 = 23515^2 + 8588^2 .

It is a cyclic number.

It is not a de Polignac number, because 626708969 - 2⁸ = 626708713 is a prime.

It is a super-2 number, since 2×626708969² = 785528263650085922, 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 626708969.

It is not a weakly prime, because it can be changed into another prime (626702969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313354484 + 313354485.

It is an arithmetic number, because the mean of its divisors is an integer number (313354485).

Almost surely, 2^626708969 is an apocalyptic number.

It is an amenable number.

626708969 is a deficient number, since it is larger than the sum of its proper divisors (1).

626708969 is an equidigital number, since it uses as much as digits as its factorization.

626708969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 626708969 is about 25034.1560472887. The cubic root of 626708969 is about 855.7665430438.

The spelling of 626708969 in words is "six hundred twenty-six million, seven hundred eight thousand, nine hundred sixty-nine".