122743729 has 2 divisors, whose sum is σ = 122743730. Its totient is φ = 122743728.

The previous prime is 122743721. The next prime is 122743783. The reversal of 122743729 is 927347221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95023504 + 27720225 = 9748^2 + 5265^2 .

It is an emirp because it is prime and its reverse (927347221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122743729 - 2³ = 122743721 is a prime.

It is not a weakly prime, because it can be changed into another prime (122743721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61371864 + 61371865.

It is an arithmetic number, because the mean of its divisors is an integer number (61371865).

Almost surely, 2^122743729 is an apocalyptic number.

It is an amenable number.

122743729 is a deficient number, since it is larger than the sum of its proper divisors (1).

122743729 is an equidigital number, since it uses as much as digits as its factorization.

122743729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 122743729 is about 11078.9768931973. The cubic root of 122743729 is about 496.9733544681.

The spelling of 122743729 in words is "one hundred twenty-two million, seven hundred forty-three thousand, seven hundred twenty-nine".