123792189 has 8 divisors (see below), whose sum is σ = 165151872. Its totient is φ = 82480320.

The previous prime is 123792169. The next prime is 123792197. The reversal of 123792189 is 981297321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123792189 - 2⁵ = 123792157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123792189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123792169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5397 + ... + 16634.

It is an arithmetic number, because the mean of its divisors is an integer number (20643984).

Almost surely, 2^123792189 is an apocalyptic number.

It is an amenable number.

123792189 is a deficient number, since it is larger than the sum of its proper divisors (41359683).

123792189 is a wasteful number, since it uses less digits than its factorization.

123792189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23907.

The product of its digits is 54432, while the sum is 42.

The square root of 123792189 is about 11126.1938235859. The cubic root of 123792189 is about 498.3843704385.

The spelling of 123792189 in words is "one hundred twenty-three million, seven hundred ninety-two thousand, one hundred eighty-nine".