13932991 has 2 divisors, whose sum is σ = 13932992. Its totient is φ = 13932990.

The previous prime is 13932973. The next prime is 13933001. The reversal of 13932991 is 19923931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13932991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13932991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13932691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6966495 + 6966496.

It is an arithmetic number, because the mean of its divisors is an integer number (6966496).

Almost surely, 2^13932991 is an apocalyptic number.

13932991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13932991 is an equidigital number, since it uses as much as digits as its factorization.

13932991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 37.

The square root of 13932991 is about 3732.6921919708. The cubic root of 13932991 is about 240.6290845655.

The spelling of 13932991 in words is "thirteen million, nine hundred thirty-two thousand, nine hundred ninety-one".