122749013 has 2 divisors, whose sum is σ = 122749014. Its totient is φ = 122749012.

The previous prime is 122748991. The next prime is 122749021. The reversal of 122749013 is 310947221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89548369 + 33200644 = 9463^2 + 5762^2 .

It is a cyclic number.

It is not a de Polignac number, because 122749013 - 2¹² = 122744917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122749073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61374506 + 61374507.

It is an arithmetic number, because the mean of its divisors is an integer number (61374507).

Almost surely, 2^122749013 is an apocalyptic number.

It is an amenable number.

122749013 is a deficient number, since it is larger than the sum of its proper divisors (1).

122749013 is an equidigital number, since it uses as much as digits as its factorization.

122749013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 122749013 is about 11079.2153603042. The cubic root of 122749013 is about 496.9804857748.

The spelling of 122749013 in words is "one hundred twenty-two million, seven hundred forty-nine thousand, thirteen".