99123144 has 64 divisors (see below), whose sum is σ = 254664000. Its totient is φ = 32138496.

The previous prime is 99123139. The next prime is 99123149. The reversal of 99123144 is 44132199.

It is an interprime number because it is at equal distance from previous prime (99123139) and next prime (99123149).

It is not an unprimeable number, because it can be changed into a prime (99123149) 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, 189267 + ... + 189789.

It is an arithmetic number, because the mean of its divisors is an integer number (3979125).

Almost surely, 2^99123144 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 99123144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127332000).

99123144 is an abundant number, since it is smaller than the sum of its proper divisors (155540856).

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

99123144 is a wasteful number, since it uses less digits than its factorization.

99123144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 730 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 99123144 is about 9956.0606667497. The cubic root of 99123144 is about 462.7982302488.

The spelling of 99123144 in words is "ninety-nine million, one hundred twenty-three thousand, one hundred forty-four".