122656791 has 8 divisors (see below), whose sum is σ = 165228784. Its totient is φ = 80928000.

The previous prime is 122656783. The next prime is 122656823. The reversal of 122656791 is 197656221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122656791 - 2³ = 122656783 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 (122656771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210460 + ... + 211041.

It is an arithmetic number, because the mean of its divisors is an integer number (20653598).

Almost surely, 2^122656791 is an apocalyptic number.

122656791 is a deficient number, since it is larger than the sum of its proper divisors (42571993).

122656791 is an equidigital number, since it uses as much as digits as its factorization.

122656791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421601.

The product of its digits is 45360, while the sum is 39.

The square root of 122656791 is about 11075.0526409584. The cubic root of 122656791 is about 496.8559932131.

The spelling of 122656791 in words is "one hundred twenty-two million, six hundred fifty-six thousand, seven hundred ninety-one".