16039891 has 8 divisors (see below), whose sum is σ = 19409760. Its totient is φ = 12939648.

The previous prime is 16039879. The next prime is 16039909. The reversal of 16039891 is 19893061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16039891 - 2⁹ = 16039379 is a prime.

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 16039891.

It is not an unprimeable number, because it can be changed into a prime (16039841) 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 7 ways as a sum of consecutive naturals, for example, 67276 + ... + 67513.

It is an arithmetic number, because the mean of its divisors is an integer number (2426220).

Almost surely, 2^16039891 is an apocalyptic number.

16039891 is a deficient number, since it is larger than the sum of its proper divisors (3369869).

16039891 is a wasteful number, since it uses less digits than its factorization.

16039891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134813.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 16039891 is about 4004.9832708764. The cubic root of 16039891 is about 252.1934508105.

The spelling of 16039891 in words is "sixteen million, thirty-nine thousand, eight hundred ninety-one".