100869 has 4 divisors (see below), whose sum is σ = 134496. Its totient is φ = 67244.

The previous prime is 100853. The next prime is 100907. The reversal of 100869 is 968001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100869 - 2⁴ = 100853 is a prime.

It is a super-2 number, since 2×100869² = 20349110322, which contains 22 as substring.

It is a D-number.

100869 is a lucky number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16809 + ... + 16814.

It is an arithmetic number, because the mean of its divisors is an integer number (33624).

2¹⁰⁰⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

100869 is a deficient number, since it is larger than the sum of its proper divisors (33627).

100869 is an equidigital number, since it uses as much as digits as its factorization.

100869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33626.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 100869 is about 317.5988035242. The cubic root of 100869 is about 46.5499521013.

It can be divided in two parts, 100 and 869, that added together give a palindrome (969).

The spelling of 100869 in words is "one hundred thousand, eight hundred sixty-nine".