100872979 has 4 divisors (see below), whose sum is σ = 101106376. Its totient is φ = 100639584.

The previous prime is 100872943. The next prime is 100873007. The reversal of 100872979 is 979278001.

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 100872979 - 2²⁵ = 67318547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100872479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116049 + ... + 116914.

It is an arithmetic number, because the mean of its divisors is an integer number (25276594).

Almost surely, 2^100872979 is an apocalyptic number.

100872979 is a deficient number, since it is larger than the sum of its proper divisors (233397).

100872979 is an equidigital number, since it uses as much as digits as its factorization.

100872979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233396.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 100872979 is about 10043.5541020099. The cubic root of 100872979 is about 465.5056418175.

The spelling of 100872979 in words is "one hundred million, eight hundred seventy-two thousand, nine hundred seventy-nine".