122897729 has 2 divisors, whose sum is σ = 122897730. Its totient is φ = 122897728.

The previous prime is 122897713. The next prime is 122897771. The reversal of 122897729 is 927798221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121330225 + 1567504 = 11015^2 + 1252^2 .

It is a cyclic number.

It is not a de Polignac number, because 122897729 - 2⁴ = 122897713 is a prime.

It is not a weakly prime, because it can be changed into another prime (122891729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61448864 + 61448865.

It is an arithmetic number, because the mean of its divisors is an integer number (61448865).

Almost surely, 2^122897729 is an apocalyptic number.

It is an amenable number.

122897729 is a deficient number, since it is larger than the sum of its proper divisors (1).

122897729 is an equidigital number, since it uses as much as digits as its factorization.

122897729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 47.

The square root of 122897729 is about 11085.9248148271. The cubic root of 122897729 is about 497.1811095793.

The spelling of 122897729 in words is "one hundred twenty-two million, eight hundred ninety-seven thousand, seven hundred twenty-nine".