122618729 has 2 divisors, whose sum is σ = 122618730. Its totient is φ = 122618728.

The previous prime is 122618701. The next prime is 122618791. The reversal of 122618729 is 927816221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101042704 + 21576025 = 10052^2 + 4645^2 .

It is a cyclic number.

It is not a de Polignac number, because 122618729 - 2²⁴ = 105841513 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 122618692 and 122618701.

It is not a weakly prime, because it can be changed into another prime (122612729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61309364 + 61309365.

It is an arithmetic number, because the mean of its divisors is an integer number (61309365).

Almost surely, 2^122618729 is an apocalyptic number.

It is an amenable number.

122618729 is a deficient number, since it is larger than the sum of its proper divisors (1).

122618729 is an equidigital number, since it uses as much as digits as its factorization.

122618729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 122618729 is about 11073.3341410796. The cubic root of 122618729 is about 496.8045942672.

The spelling of 122618729 in words is "one hundred twenty-two million, six hundred eighteen thousand, seven hundred twenty-nine".