12916891 has 8 divisors (see below), whose sum is σ = 13983200. Its totient is φ = 11860992.

The previous prime is 12916879. The next prime is 12916901. The reversal of 12916891 is 19861921.

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

It is not a de Polignac number, because 12916891 - 2⁵ = 12916859 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 12916891.

It is not an unprimeable number, because it can be changed into a prime (12916831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91 + ... + 5083.

It is an arithmetic number, because the mean of its divisors is an integer number (1747900).

Almost surely, 2^12916891 is an apocalyptic number.

12916891 is a deficient number, since it is larger than the sum of its proper divisors (1066309).

12916891 is a wasteful number, since it uses less digits than its factorization.

12916891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5205.

The product of its digits is 7776, while the sum is 37.

The square root of 12916891 is about 3594.0076516335. The cubic root of 12916891 is about 234.6313277626.

It can be divided in two parts, 129 and 16891, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 12916891 in words is "twelve million, nine hundred sixteen thousand, eight hundred ninety-one".