123872919 has 16 divisors (see below), whose sum is σ = 170346240. Its totient is φ = 80030720.

The previous prime is 123872911. The next prime is 123873011. The reversal of 123872919 is 919278321.

It is a cyclic number.

It is not a de Polignac number, because 123872919 - 2³ = 123872911 is a prime.

It is a super-2 number, since 2×123872919² = 30689000123161122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123872911) 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, 7639 + ... + 17495.

It is an arithmetic number, because the mean of its divisors is an integer number (10646640).

Almost surely, 2^123872919 is an apocalyptic number.

123872919 is a deficient number, since it is larger than the sum of its proper divisors (46473321).

123872919 is an equidigital number, since it uses as much as digits as its factorization.

123872919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9990.

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

The square root of 123872919 is about 11129.8211575928. The cubic root of 123872919 is about 498.4926859079.

The spelling of 123872919 in words is "one hundred twenty-three million, eight hundred seventy-two thousand, nine hundred nineteen".