122788137 has 4 divisors (see below), whose sum is σ = 163717520. Its totient is φ = 81858756.

The previous prime is 122788109. The next prime is 122788139. The reversal of 122788137 is 731887221.

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 not a de Polignac number, because 122788137 - 2⁸ = 122787881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122788095 and 122788104.

It is not an unprimeable number, because it can be changed into a prime (122788139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20464687 + ... + 20464692.

It is an arithmetic number, because the mean of its divisors is an integer number (40929380).

Almost surely, 2^122788137 is an apocalyptic number.

It is an amenable number.

122788137 is a deficient number, since it is larger than the sum of its proper divisors (40929383).

122788137 is an equidigital number, since it uses as much as digits as its factorization.

122788137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40929382.

The product of its digits is 37632, while the sum is 39.

The square root of 122788137 is about 11080.9808681362. The cubic root of 122788137 is about 497.0332813089.

The spelling of 122788137 in words is "one hundred twenty-two million, seven hundred eighty-eight thousand, one hundred thirty-seven".