626942089 has 2 divisors, whose sum is σ = 626942090. Its totient is φ = 626942088.

The previous prime is 626942087. The next prime is 626942123. The reversal of 626942089 is 980249626.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543822400 + 83119689 = 23320^2 + 9117^2 .

It is a cyclic number.

It is not a de Polignac number, because 626942089 - 2¹ = 626942087 is a prime.

Together with 626942087, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (626942087) 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, 313471044 + 313471045.

It is an arithmetic number, because the mean of its divisors is an integer number (313471045).

Almost surely, 2^626942089 is an apocalyptic number.

It is an amenable number.

626942089 is a deficient number, since it is larger than the sum of its proper divisors (1).

626942089 is an equidigital number, since it uses as much as digits as its factorization.

626942089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 626942089 is about 25038.8116531117. The cubic root of 626942089 is about 855.8726377787.

The spelling of 626942089 in words is "six hundred twenty-six million, nine hundred forty-two thousand, eighty-nine".