122749379 has 2 divisors, whose sum is σ = 122749380. Its totient is φ = 122749378.

The previous prime is 122749349. The next prime is 122749381. The reversal of 122749379 is 973947221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122749379 - 2¹⁶ = 122683843 is a prime.

Together with 122749381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122749309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61374689 + 61374690.

It is an arithmetic number, because the mean of its divisors is an integer number (61374690).

Almost surely, 2^122749379 is an apocalyptic number.

122749379 is a deficient number, since it is larger than the sum of its proper divisors (1).

122749379 is an equidigital number, since it uses as much as digits as its factorization.

122749379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 44.

The square root of 122749379 is about 11079.2318777070. The cubic root of 122749379 is about 496.9809797222.

The spelling of 122749379 in words is "one hundred twenty-two million, seven hundred forty-nine thousand, three hundred seventy-nine".