13973191 has 2 divisors, whose sum is σ = 13973192. Its totient is φ = 13973190.

The previous prime is 13973173. The next prime is 13973203. The reversal of 13973191 is 19137931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13973191 - 2²³ = 5584583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13973101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6986595 + 6986596.

It is an arithmetic number, because the mean of its divisors is an integer number (6986596).

Almost surely, 2^13973191 is an apocalyptic number.

13973191 is a deficient number, since it is larger than the sum of its proper divisors (1).

13973191 is an equidigital number, since it uses as much as digits as its factorization.

13973191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5103, while the sum is 34.

The square root of 13973191 is about 3738.0731667532. The cubic root of 13973191 is about 240.8602864382.

The spelling of 13973191 in words is "thirteen million, nine hundred seventy-three thousand, one hundred ninety-one".