123744399 has 8 divisors (see below), whose sum is σ = 165083520. Its totient is φ = 82450776.

The previous prime is 123744367. The next prime is 123744403. The reversal of 123744399 is 993447321.

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

It is not a de Polignac number, because 123744399 - 2⁵ = 123744367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123744399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123744329) 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, 4419 + ... + 16340.

It is an arithmetic number, because the mean of its divisors is an integer number (20635440).

Almost surely, 2^123744399 is an apocalyptic number.

123744399 is a deficient number, since it is larger than the sum of its proper divisors (41339121).

123744399 is a wasteful number, since it uses less digits than its factorization.

123744399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22749.

The product of its digits is 163296, while the sum is 42.

The square root of 123744399 is about 11124.0459815662. The cubic root of 123744399 is about 498.3202283876.

The spelling of 123744399 in words is "one hundred twenty-three million, seven hundred forty-four thousand, three hundred ninety-nine".