122188279 has 2 divisors, whose sum is σ = 122188280. Its totient is φ = 122188278.

The previous prime is 122188271. The next prime is 122188289. The reversal of 122188279 is 972881221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122188279 - 2³ = 122188271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122188271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61094139 + 61094140.

It is an arithmetic number, because the mean of its divisors is an integer number (61094140).

Almost surely, 2^122188279 is an apocalyptic number.

122188279 is a deficient number, since it is larger than the sum of its proper divisors (1).

122188279 is an equidigital number, since it uses as much as digits as its factorization.

122188279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 40.

The square root of 122188279 is about 11053.8807212671. The cubic root of 122188279 is about 496.2225726180. Note that the first 3 decimals are identical.

The spelling of 122188279 in words is "one hundred twenty-two million, one hundred eighty-eight thousand, two hundred seventy-nine".