122753889 has 24 divisors (see below), whose sum is σ = 197627040. Its totient is φ = 72966528.

The previous prime is 122753887. The next prime is 122753903. The reversal of 122753889 is 988357221.

It is a happy number.

122753889 is a `hidden beast` number, since 12 + 27 + 538 + 89 = 666.

It is not a de Polignac number, because 122753889 - 2¹ = 122753887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122753887) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18207 + ... + 24020.

It is an arithmetic number, because the mean of its divisors is an integer number (8234460).

Almost surely, 2^122753889 is an apocalyptic number.

122753889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

122753889 is a deficient number, since it is larger than the sum of its proper divisors (74873151).

122753889 is a wasteful number, since it uses less digits than its factorization.

122753889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42269 (or 42266 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 122753889 is about 11079.4354098032. The cubic root of 122753889 is about 496.9870662615.

The spelling of 122753889 in words is "one hundred twenty-two million, seven hundred fifty-three thousand, eight hundred eighty-nine".