122688427 has 2 divisors, whose sum is σ = 122688428. Its totient is φ = 122688426.

The previous prime is 122688409. The next prime is 122688431. The reversal of 122688427 is 724886221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122688427 - 2¹¹ = 122686379 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122688427.

It is not a weakly prime, because it can be changed into another prime (122688487) 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 as a sum of consecutive naturals, namely, 61344213 + 61344214.

It is an arithmetic number, because the mean of its divisors is an integer number (61344214).

Almost surely, 2^122688427 is an apocalyptic number.

122688427 is a deficient number, since it is larger than the sum of its proper divisors (1).

122688427 is an equidigital number, since it uses as much as digits as its factorization.

122688427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86016, while the sum is 40.

The square root of 122688427 is about 11076.4808039377. The cubic root of 122688427 is about 496.8987063937.

The spelling of 122688427 in words is "one hundred twenty-two million, six hundred eighty-eight thousand, four hundred twenty-seven".