122688999 has 12 divisors (see below), whose sum is σ = 183781416. Its totient is φ = 81792504.

The previous prime is 122688997. The next prime is 122689027. The reversal of 122688999 is 999886221.

It is not a de Polignac number, because 122688999 - 2¹ = 122688997 is a prime.

It is a plaindrome in base 10.

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252204 + ... + 252689.

It is an arithmetic number, because the mean of its divisors is an integer number (15315118).

Almost surely, 2^122688999 is an apocalyptic number.

122688999 is a deficient number, since it is larger than the sum of its proper divisors (61092417).

122688999 is an frugal number, since it uses more digits than its factorization.

122688999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504908 (or 504896 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 122688999 is about 11076.5066243830. The cubic root of 122688999 is about 496.8994786089.

The spelling of 122688999 in words is "one hundred twenty-two million, six hundred eighty-eight thousand, nine hundred ninety-nine".