14005991 has 2 divisors, whose sum is σ = 14005992. Its totient is φ = 14005990.

The previous prime is 14005967. The next prime is 14005993. The reversal of 14005991 is 19950041.

It is a strong prime.

It is an emirp because it is prime and its reverse (19950041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14005991 - 2¹⁰ = 14004967 is a prime.

Together with 14005993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14005993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7002995 + 7002996.

It is an arithmetic number, because the mean of its divisors is an integer number (7002996).

Almost surely, 2^14005991 is an apocalyptic number.

14005991 is a deficient number, since it is larger than the sum of its proper divisors (1).

14005991 is an equidigital number, since it uses as much as digits as its factorization.

14005991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 14005991 is about 3742.4578821945. The cubic root of 14005991 is about 241.0486004726.

The spelling of 14005991 in words is "fourteen million, five thousand, nine hundred ninety-one".