122742679 has 4 divisors (see below), whose sum is σ = 129202840. Its totient is φ = 116282520.

The previous prime is 122742667. The next prime is 122742701. The reversal of 122742679 is 976247221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122742679 - 2⁷ = 122742551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122742619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3230052 + ... + 3230089.

It is an arithmetic number, because the mean of its divisors is an integer number (32300710).

Almost surely, 2^122742679 is an apocalyptic number.

122742679 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

122742679 is a deficient number, since it is larger than the sum of its proper divisors (6460161).

122742679 is an equidigital number, since it uses as much as digits as its factorization.

122742679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6460160.

The product of its digits is 84672, while the sum is 40.

The square root of 122742679 is about 11078.9295060489. The cubic root of 122742679 is about 496.9719373597.

The spelling of 122742679 in words is "one hundred twenty-two million, seven hundred forty-two thousand, six hundred seventy-nine".