100991307 has 4 divisors (see below), whose sum is σ = 134655080. Its totient is φ = 67327536.

The previous prime is 100991299. The next prime is 100991347. The reversal of 100991307 is 703199001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 703199001 = 3 ⋅234399667.

It is not a de Polignac number, because 100991307 - 2³ = 100991299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100991347) 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, 16831882 + ... + 16831887.

It is an arithmetic number, because the mean of its divisors is an integer number (33663770).

Almost surely, 2^100991307 is an apocalyptic number.

100991307 is a deficient number, since it is larger than the sum of its proper divisors (33663773).

100991307 is an equidigital number, since it uses as much as digits as its factorization.

100991307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33663772.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 100991307 is about 10049.4431188997. The cubic root of 100991307 is about 465.6875895444.

The spelling of 100991307 in words is "one hundred million, nine hundred ninety-one thousand, three hundred seven".