16479891 has 12 divisors (see below), whose sum is σ = 24839568. Its totient is φ = 10508784.

The previous prime is 16479889. The next prime is 16479913. The reversal of 16479891 is 19897461.

It is a happy number.

It is not a de Polignac number, because 16479891 - 2¹ = 16479889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16479871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39600 + ... + 40013.

It is an arithmetic number, because the mean of its divisors is an integer number (2069964).

Almost surely, 2^16479891 is an apocalyptic number.

16479891 is a deficient number, since it is larger than the sum of its proper divisors (8359677).

16479891 is a wasteful number, since it uses less digits than its factorization.

16479891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79642 (or 79639 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 16479891 is about 4059.5432009033. The cubic root of 16479891 is about 254.4787043628.

The spelling of 16479891 in words is "sixteen million, four hundred seventy-nine thousand, eight hundred ninety-one".