122656637 has 4 divisors (see below), whose sum is σ = 122686080. Its totient is φ = 122627196.

The previous prime is 122656613. The next prime is 122656643. The reversal of 122656637 is 736656221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122656637 - 2¹⁴ = 122640253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122656637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122656607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7187 + ... + 17232.

It is an arithmetic number, because the mean of its divisors is an integer number (30671520).

Almost surely, 2^122656637 is an apocalyptic number.

It is an amenable number.

122656637 is a deficient number, since it is larger than the sum of its proper divisors (29443).

122656637 is an equidigital number, since it uses as much as digits as its factorization.

122656637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29442.

The product of its digits is 90720, while the sum is 38.

The square root of 122656637 is about 11075.0456883933. The cubic root of 122656637 is about 496.8557852728.

The spelling of 122656637 in words is "one hundred twenty-two million, six hundred fifty-six thousand, six hundred thirty-seven".