122153889 has 16 divisors (see below), whose sum is σ = 191346624. Its totient is φ = 68337600.

The previous prime is 122153881. The next prime is 122153917. The reversal of 122153889 is 988351221.

It is not a de Polignac number, because 122153889 - 2³ = 122153881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (122153881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141942 + ... + 142799.

It is an arithmetic number, because the mean of its divisors is an integer number (11959164).

Almost surely, 2^122153889 is an apocalyptic number.

It is an amenable number.

122153889 is a deficient number, since it is larger than the sum of its proper divisors (69192735).

122153889 is a wasteful number, since it uses less digits than its factorization.

122153889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284768.

The product of its digits is 34560, while the sum is 39.

The square root of 122153889 is about 11052.3250495088. The cubic root of 122153889 is about 496.1760141547.

The spelling of 122153889 in words is "one hundred twenty-two million, one hundred fifty-three thousand, eight hundred eighty-nine".