13984891 has 4 divisors (see below), whose sum is σ = 13995072. Its totient is φ = 13974712.

The previous prime is 13984879. The next prime is 13984903. The reversal of 13984891 is 19848931.

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, and also an emirpimes, since its reverse is a distinct semiprime: 19848931 = 23 ⋅862997.

It is an interprime number because it is at equal distance from previous prime (13984879) and next prime (13984903).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13984891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13984871) 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, 2635 + ... + 5908.

It is an arithmetic number, because the mean of its divisors is an integer number (3498768).

Almost surely, 2^13984891 is an apocalyptic number.

13984891 is a deficient number, since it is larger than the sum of its proper divisors (10181).

13984891 is an equidigital number, since it uses as much as digits as its factorization.

13984891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10180.

The product of its digits is 62208, while the sum is 43.

The square root of 13984891 is about 3739.6378166876. The cubic root of 13984891 is about 240.9274932101.

The spelling of 13984891 in words is "thirteen million, nine hundred eighty-four thousand, eight hundred ninety-one".