100239999 has 4 divisors (see below), whose sum is σ = 133653336. Its totient is φ = 66826664.

The previous prime is 100239983. The next prime is 100240027. The reversal of 100239999 is 999932001.

It is a happy number.

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 100239999 - 2⁴ = 100239983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100239999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100239499) 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, 16706664 + ... + 16706669.

It is an arithmetic number, because the mean of its divisors is an integer number (33413334).

Almost surely, 2^100239999 is an apocalyptic number.

100239999 is a deficient number, since it is larger than the sum of its proper divisors (33413337).

100239999 is an equidigital number, since it uses as much as digits as its factorization.

100239999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33413336.

The product of its (nonzero) digits is 39366, while the sum is 42.

The square root of 100239999 is about 10011.9927586870. The cubic root of 100239999 is about 464.5299122570.

The spelling of 100239999 in words is "one hundred million, two hundred thirty-nine thousand, nine hundred ninety-nine".