122792779 has 4 divisors (see below), whose sum is σ = 122928480. Its totient is φ = 122657080.

The previous prime is 122792749. The next prime is 122792783. The reversal of 122792779 is 977297221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977297221 = 5417 ⋅180413.

It is a cyclic number.

It is not a de Polignac number, because 122792779 - 2⁷ = 122792651 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (122792729) 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, 66484 + ... + 68305.

It is an arithmetic number, because the mean of its divisors is an integer number (30732120).

Almost surely, 2^122792779 is an apocalyptic number.

122792779 is a deficient number, since it is larger than the sum of its proper divisors (135701).

122792779 is an equidigital number, since it uses as much as digits as its factorization.

122792779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135700.

The product of its digits is 222264, while the sum is 46.

The square root of 122792779 is about 11081.1903241484. The cubic root of 122792779 is about 497.0395446702.

The spelling of 122792779 in words is "one hundred twenty-two million, seven hundred ninety-two thousand, seven hundred seventy-nine".