100099843 has 4 divisors (see below), whose sum is σ = 100659240. Its totient is φ = 99540448.

The previous prime is 100099817. The next prime is 100099889. The reversal of 100099843 is 348990001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 348990001 = 53 ⋅6584717.

It is a cyclic number.

It is not a de Polignac number, because 100099843 - 2²⁵ = 66545411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100099799 and 100099808.

It is not an unprimeable number, because it can be changed into a prime (100090843) 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, 279430 + ... + 279787.

It is an arithmetic number, because the mean of its divisors is an integer number (25164810).

Almost surely, 2^100099843 is an apocalyptic number.

100099843 is a deficient number, since it is larger than the sum of its proper divisors (559397).

100099843 is an equidigital number, since it uses as much as digits as its factorization.

100099843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559396.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 100099843 is about 10004.9909045436. The cubic root of 100099843 is about 464.3133086964.

The spelling of 100099843 in words is "one hundred million, ninety-nine thousand, eight hundred forty-three".