14991191 has 2 divisors, whose sum is σ = 14991192. Its totient is φ = 14991190.

The previous prime is 14991181. The next prime is 14991227. The reversal of 14991191 is 19119941.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 14991191 - 2¹⁰ = 14990167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14991121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7495595 + 7495596.

It is an arithmetic number, because the mean of its divisors is an integer number (7495596).

Almost surely, 2^14991191 is an apocalyptic number.

14991191 is a deficient number, since it is larger than the sum of its proper divisors (1).

14991191 is an equidigital number, since it uses as much as digits as its factorization.

14991191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 35.

The square root of 14991191 is about 3871.8459421831. The cubic root of 14991191 is about 246.5729205079.

The spelling of 14991191 in words is "fourteen million, nine hundred ninety-one thousand, one hundred ninety-one".