16344891 has 6 divisors (see below), whose sum is σ = 23609300. Its totient is φ = 10896588.

The previous prime is 16344847. The next prime is 16344901. The reversal of 16344891 is 19844361.

It is not a de Polignac number, because 16344891 - 2⁶ = 16344827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16344821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 908041 + ... + 908058.

Almost surely, 2^16344891 is an apocalyptic number.

16344891 is a deficient number, since it is larger than the sum of its proper divisors (7264409).

16344891 is a wasteful number, since it uses less digits than its factorization.

16344891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816105 (or 1816102 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 16344891 is about 4042.8815218851. The cubic root of 16344891 is about 253.7819185423.

It can be divided in two parts, 163 and 44891, that added together give a palindrome (45054).

The spelling of 16344891 in words is "sixteen million, three hundred forty-four thousand, eight hundred ninety-one".