122688997 has 2 divisors, whose sum is σ = 122688998. Its totient is φ = 122688996.

The previous prime is 122688991. The next prime is 122689027. The reversal of 122688997 is 799886221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117809316 + 4879681 = 10854^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 122688997 - 2¹⁹ = 122164709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122688991) 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, 61344498 + 61344499.

It is an arithmetic number, because the mean of its divisors is an integer number (61344499).

Almost surely, 2^122688997 is an apocalyptic number.

It is an amenable number.

122688997 is a deficient number, since it is larger than the sum of its proper divisors (1).

122688997 is an equidigital number, since it uses as much as digits as its factorization.

122688997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 52.

The square root of 122688997 is about 11076.5065341018. The cubic root of 122688997 is about 496.8994759089.

The spelling of 122688997 in words is "one hundred twenty-two million, six hundred eighty-eight thousand, nine hundred ninety-seven".