123172192 has 72 divisors (see below), whose sum is σ = 287165088. Its totient is φ = 51659520.

The previous prime is 123172183. The next prime is 123172201. The reversal of 123172192 is 291271321.

It is an interprime number because it is at equal distance from previous prime (123172183) and next prime (123172201).

It is a self number, because there is not a number n which added to its sum of digits gives 123172192.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49113 + ... + 51559.

It is an arithmetic number, because the mean of its divisors is an integer number (3988404).

Almost surely, 2^123172192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123172192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143582544).

123172192 is an abundant number, since it is smaller than the sum of its proper divisors (163992896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123172192 is a wasteful number, since it uses less digits than its factorization.

123172192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492 (or 2473 counting only the distinct ones).

The product of its digits is 1512, while the sum is 28.

The square root of 123172192 is about 11098.2968062672. The cubic root of 123172192 is about 497.5509465263.

The spelling of 123172192 in words is "one hundred twenty-three million, one hundred seventy-two thousand, one hundred ninety-two".