122739637 has 2 divisors, whose sum is σ = 122739638. Its totient is φ = 122739636.

The previous prime is 122739623. The next prime is 122739671. The reversal of 122739637 is 736937221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70408881 + 52330756 = 8391^2 + 7234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122739637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122739637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122739697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61369818 + 61369819.

It is an arithmetic number, because the mean of its divisors is an integer number (61369819).

Almost surely, 2^122739637 is an apocalyptic number.

It is an amenable number.

122739637 is a deficient number, since it is larger than the sum of its proper divisors (1).

122739637 is an equidigital number, since it uses as much as digits as its factorization.

122739637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 40.

The square root of 122739637 is about 11078.7922175660. The cubic root of 122739637 is about 496.9678317486.

The spelling of 122739637 in words is "one hundred twenty-two million, seven hundred thirty-nine thousand, six hundred thirty-seven".