14491391 has 2 divisors, whose sum is σ = 14491392. Its totient is φ = 14491390.

The previous prime is 14491339. The next prime is 14491397. The reversal of 14491391 is 19319441.

It is a strong prime.

It is an emirp because it is prime and its reverse (19319441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14491391 is a prime.

It is a super-2 number, since 2×14491391² = 420000826229762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14491397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7245695 + 7245696.

It is an arithmetic number, because the mean of its divisors is an integer number (7245696).

Almost surely, 2^14491391 is an apocalyptic number.

14491391 is a deficient number, since it is larger than the sum of its proper divisors (1).

14491391 is an equidigital number, since it uses as much as digits as its factorization.

14491391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 32.

The square root of 14491391 is about 3806.7559680127. The cubic root of 14491391 is about 243.8016786328.

The spelling of 14491391 in words is "fourteen million, four hundred ninety-one thousand, three hundred ninety-one".