14331991 has 2 divisors, whose sum is σ = 14331992. Its totient is φ = 14331990.

The previous prime is 14331983. The next prime is 14332007. The reversal of 14331991 is 19913341.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 14331991 - 2³ = 14331983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14331971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7165995 + 7165996.

It is an arithmetic number, because the mean of its divisors is an integer number (7165996).

Almost surely, 2^14331991 is an apocalyptic number.

14331991 is a deficient number, since it is larger than the sum of its proper divisors (1).

14331991 is an equidigital number, since it uses as much as digits as its factorization.

14331991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 31.

The square root of 14331991 is about 3785.7616142594. The cubic root of 14331991 is about 242.9044711352.

The spelling of 14331991 in words is "fourteen million, three hundred thirty-one thousand, nine hundred ninety-one".