123432099 has 48 divisors (see below), whose sum is σ = 202159104. Its totient is φ = 65577600.

The previous prime is 123432083. The next prime is 123432103. The reversal of 123432099 is 990234321.

It is a Cunningham number, because it is equal to 11110²-1.

It is not a de Polignac number, because 123432099 - 2⁴ = 123432083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123432899) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 455334 + ... + 455604.

It is an arithmetic number, because the mean of its divisors is an integer number (4211648).

Almost surely, 2^123432099 is an apocalyptic number.

123432099 is a deficient number, since it is larger than the sum of its proper divisors (78727005).

123432099 is a wasteful number, since it uses less digits than its factorization.

123432099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 123432099 is about 11109.9999549955. Note that the first 4 decimals coincide. The cubic root of 123432099 is about 497.9006632400.

It can be divided in two parts, 1234 and 32099, that added together give a palindrome (33333).

The spelling of 123432099 in words is "one hundred twenty-three million, four hundred thirty-two thousand, ninety-nine".