16118899 has 4 divisors (see below), whose sum is σ = 16128520. Its totient is φ = 16109280.

The previous prime is 16118891. The next prime is 16118903. The reversal of 16118899 is 99881161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16118899 - 2³ = 16118891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16118891) 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, 1569 + ... + 5890.

It is an arithmetic number, because the mean of its divisors is an integer number (4032130).

Almost surely, 2^16118899 is an apocalyptic number.

16118899 is a deficient number, since it is larger than the sum of its proper divisors (9621).

16118899 is an equidigital number, since it uses as much as digits as its factorization.

16118899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9620.

The product of its digits is 31104, while the sum is 43.

The square root of 16118899 is about 4014.8348658444. The cubic root of 16118899 is about 252.6068508333.

The spelling of 16118899 in words is "sixteen million, one hundred eighteen thousand, eight hundred ninety-nine".