16990199 has 4 divisors (see below), whose sum is σ = 17884440. Its totient is φ = 16095960.

The previous prime is 16990177. The next prime is 16990213. The reversal of 16990199 is 99109961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99109961 = 1093 ⋅90677.

It is a cyclic number.

It is not a de Polignac number, because 16990199 - 2⁸ = 16989943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16993199) 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, 447092 + ... + 447129.

It is an arithmetic number, because the mean of its divisors is an integer number (4471110).

Almost surely, 2^16990199 is an apocalyptic number.

16990199 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

16990199 is a deficient number, since it is larger than the sum of its proper divisors (894241).

16990199 is an equidigital number, since it uses as much as digits as its factorization.

16990199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894240.

The product of its (nonzero) digits is 39366, while the sum is 44.

The square root of 16990199 is about 4121.9169084299. The cubic root of 16990199 is about 257.0787355845.

The spelling of 16990199 in words is "sixteen million, nine hundred ninety thousand, one hundred ninety-nine".