100899 has 16 divisors (see below), whose sum is σ = 155040. Its totient is φ = 64800.

The previous prime is 100853. The next prime is 100907. The reversal of 100899 is 998001.

It is not a de Polignac number, because 100899 - 2¹³ = 92707 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 949 + ... + 1049.

It is an arithmetic number, because the mean of its divisors is an integer number (9690).

2¹⁰⁰⁸⁹⁹ is an apocalyptic number.

100899 is a deficient number, since it is larger than the sum of its proper divisors (54141).

100899 is a wasteful number, since it uses less digits than its factorization.

100899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 100899 is about 317.6460294101. The cubic root of 100899 is about 46.5545665357.

It can be divided in two parts, 100 and 899, that added together give a palindrome (999).

The spelling of 100899 in words is "one hundred thousand, eight hundred ninety-nine".