14391205991 has 2 divisors, whose sum is σ = 14391205992. Its totient is φ = 14391205990.

The previous prime is 14391205957. The next prime is 14391206003. The reversal of 14391205991 is 19950219341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 14391205991 - 2¹⁰ = 14391204967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14391205921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7195602995 + 7195602996.

It is an arithmetic number, because the mean of its divisors is an integer number (7195602996).

Almost surely, 2^14391205991 is an apocalyptic number.

14391205991 is a deficient number, since it is larger than the sum of its proper divisors (1).

14391205991 is an equidigital number, since it uses as much as digits as its factorization.

14391205991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The spelling of 14391205991 in words is "fourteen billion, three hundred ninety-one million, two hundred five thousand, nine hundred ninety-one".