100688879 has 4 divisors (see below), whose sum is σ = 100894440. Its totient is φ = 100483320.

The previous prime is 100688839. The next prime is 100688881. The reversal of 100688879 is 978886001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100688879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100688839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102044 + ... + 103025.

It is an arithmetic number, because the mean of its divisors is an integer number (25223610).

Almost surely, 2^100688879 is an apocalyptic number.

100688879 is a deficient number, since it is larger than the sum of its proper divisors (205561).

100688879 is an equidigital number, since it uses as much as digits as its factorization.

100688879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205560.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 100688879 is about 10034.3848341590. The cubic root of 100688879 is about 465.2222762810. Note that the first 4 decimals are identical.

The spelling of 100688879 in words is "one hundred million, six hundred eighty-eight thousand, eight hundred seventy-nine".