122656879 has 4 divisors (see below), whose sum is σ = 123021184. Its totient is φ = 122292576.

The previous prime is 122656843. The next prime is 122656883. The reversal of 122656879 is 978656221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122656879 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 (122656889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181647 + ... + 182320.

It is an arithmetic number, because the mean of its divisors is an integer number (30755296).

Almost surely, 2^122656879 is an apocalyptic number.

122656879 is a deficient number, since it is larger than the sum of its proper divisors (364305).

122656879 is an equidigital number, since it uses as much as digits as its factorization.

122656879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364304.

The product of its digits is 362880, while the sum is 46.

The square root of 122656879 is about 11075.0566138508. The cubic root of 122656879 is about 496.8561120360.

The spelling of 122656879 in words is "one hundred twenty-two million, six hundred fifty-six thousand, eight hundred seventy-nine".