16399927 has 4 divisors (see below), whose sum is σ = 16410456. Its totient is φ = 16389400.

The previous prime is 16399909. The next prime is 16399931. The reversal of 16399927 is 72999361.

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 16399927 - 2¹¹ = 16397879 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 (16399937) 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, 2413 + ... + 6214.

It is an arithmetic number, because the mean of its divisors is an integer number (4102614).

Almost surely, 2^16399927 is an apocalyptic number.

16399927 is a deficient number, since it is larger than the sum of its proper divisors (10529).

16399927 is an equidigital number, since it uses as much as digits as its factorization.

16399927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10528.

The product of its digits is 183708, while the sum is 46.

The square root of 16399927 is about 4049.6823332207. The cubic root of 16399927 is about 254.0664415849.

The spelling of 16399927 in words is "sixteen million, three hundred ninety-nine thousand, nine hundred twenty-seven".