14891791 has 2 divisors, whose sum is σ = 14891792. Its totient is φ = 14891790.

The previous prime is 14891783. The next prime is 14891837. The reversal of 14891791 is 19719841.

It is a weak prime.

It is an emirp because it is prime and its reverse (19719841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14891791 - 2³ = 14891783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14891291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7445895 + 7445896.

It is an arithmetic number, because the mean of its divisors is an integer number (7445896).

Almost surely, 2^14891791 is an apocalyptic number.

14891791 is a deficient number, since it is larger than the sum of its proper divisors (1).

14891791 is an equidigital number, since it uses as much as digits as its factorization.

14891791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 40.

The square root of 14891791 is about 3858.9883389303. The cubic root of 14891791 is about 246.0267393324.

The spelling of 14891791 in words is "fourteen million, eight hundred ninety-one thousand, seven hundred ninety-one".