122688998 has 4 divisors (see below), whose sum is σ = 184033500. Its totient is φ = 61344498.

The previous prime is 122688997. The next prime is 122689027. The reversal of 122688998 is 899886221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 899886221 = 13 ⋅69222017.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a 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, 30672248 + ... + 30672251.

It is an arithmetic number, because the mean of its divisors is an integer number (46008375).

Almost surely, 2^122688998 is an apocalyptic number.

122688998 is a deficient number, since it is larger than the sum of its proper divisors (61344502).

122688998 is an equidigital number, since it uses as much as digits as its factorization.

122688998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61344501.

The product of its digits is 995328, while the sum is 53.

The square root of 122688998 is about 11076.5065792424. The cubic root of 122688998 is about 496.8994772589.

The spelling of 122688998 in words is "one hundred twenty-two million, six hundred eighty-eight thousand, nine hundred ninety-eight".