123823915 has 4 divisors (see below), whose sum is σ = 148588704. Its totient is φ = 99059128.

The previous prime is 123823907. The next prime is 123823919. The reversal of 123823915 is 519328321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123823915 - 2³ = 123823907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123823919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12382387 + ... + 12382396.

It is an arithmetic number, because the mean of its divisors is an integer number (37147176).

Almost surely, 2^123823915 is an apocalyptic number.

123823915 is a deficient number, since it is larger than the sum of its proper divisors (24764789).

123823915 is an equidigital number, since it uses as much as digits as its factorization.

123823915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24764788.

The product of its digits is 12960, while the sum is 34.

The square root of 123823915 is about 11127.6194668941. The cubic root of 123823915 is about 498.4269428391.

The spelling of 123823915 in words is "one hundred twenty-three million, eight hundred twenty-three thousand, nine hundred fifteen".