122387729 has 2 divisors, whose sum is σ = 122387730. Its totient is φ = 122387728.

The previous prime is 122387719. The next prime is 122387773. The reversal of 122387729 is 927783221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81721600 + 40666129 = 9040^2 + 6377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122387729 is a prime.

It is a Chen prime.

It is equal to p_6969812 and since 122387729 and 6969812 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (122387719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61193864 + 61193865.

It is an arithmetic number, because the mean of its divisors is an integer number (61193865).

Almost surely, 2^122387729 is an apocalyptic number.

It is an amenable number.

122387729 is a deficient number, since it is larger than the sum of its proper divisors (1).

122387729 is an equidigital number, since it uses as much as digits as its factorization.

122387729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 122387729 is about 11062.8987611747. The cubic root of 122387729 is about 496.4924233508.

The spelling of 122387729 in words is "one hundred twenty-two million, three hundred eighty-seven thousand, seven hundred twenty-nine".