109899919 has 4 divisors (see below), whose sum is σ = 109939144. Its totient is φ = 109860696.

The previous prime is 109899887. The next prime is 109899931. The reversal of 109899919 is 919998901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 919998901 = 71 ⋅12957731.

It is a cyclic number.

It is not a de Polignac number, because 109899919 - 2⁵ = 109899887 is a prime.

It is a super-2 number, since 2×109899919² = 24155984392413122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109899919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103899919) 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, 15057 + ... + 21130.

It is an arithmetic number, because the mean of its divisors is an integer number (27484786).

Almost surely, 2^109899919 is an apocalyptic number.

109899919 is a deficient number, since it is larger than the sum of its proper divisors (39225).

109899919 is an equidigital number, since it uses as much as digits as its factorization.

109899919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39224.

The product of its (nonzero) digits is 472392, while the sum is 55.

The square root of 109899919 is about 10483.3162215017. The cubic root of 109899919 is about 478.9966294656.

The spelling of 109899919 in words is "one hundred nine million, eight hundred ninety-nine thousand, nine hundred nineteen".