100109979 has 8 divisors (see below), whose sum is σ = 148311120. Its totient is φ = 66739968.

The previous prime is 100109941. The next prime is 100109983. The reversal of 100109979 is 979901001.

It is not a de Polignac number, because 100109979 - 2¹⁹ = 99585691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100109279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1853862 + ... + 1853915.

It is an arithmetic number, because the mean of its divisors is an integer number (18538890).

Almost surely, 2^100109979 is an apocalyptic number.

100109979 is a deficient number, since it is larger than the sum of its proper divisors (48201141).

100109979 is an equidigital number, since it uses as much as digits as its factorization.

100109979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707786 (or 3707780 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 36.

The square root of 100109979 is about 10005.4974389083. The cubic root of 100109979 is about 464.3289801190.

The spelling of 100109979 in words is "one hundred million, one hundred nine thousand, nine hundred seventy-nine".