16045999 has 4 divisors (see below), whose sum is σ = 16193320. Its totient is φ = 15898680.

The previous prime is 16045993. The next prime is 16046029. The reversal of 16045999 is 99954061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99954061 = 7687 ⋅13003.

It is a cyclic number.

It is not a de Polignac number, because 16045999 - 2⁹ = 16045487 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 (16045993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73497 + ... + 73714.

It is an arithmetic number, because the mean of its divisors is an integer number (4048330).

Almost surely, 2^16045999 is an apocalyptic number.

16045999 is a deficient number, since it is larger than the sum of its proper divisors (147321).

16045999 is a wasteful number, since it uses less digits than its factorization.

16045999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147320.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 16045999 is about 4005.7457482971. The cubic root of 16045999 is about 252.2254585532.

The spelling of 16045999 in words is "sixteen million, forty-five thousand, nine hundred ninety-nine".