11993574191 has 2 divisors, whose sum is σ = 11993574192. Its totient is φ = 11993574190.

The previous prime is 11993574179. The next prime is 11993574199. The reversal of 11993574191 is 19147539911.

It is a strong prime.

It is an emirp because it is prime and its reverse (19147539911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11993574191 - 2¹⁸ = 11993312047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11993574199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5996787095 + 5996787096.

It is an arithmetic number, because the mean of its divisors is an integer number (5996787096).

Almost surely, 2^11993574191 is an apocalyptic number.

11993574191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11993574191 is an equidigital number, since it uses as much as digits as its factorization.

11993574191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 50.

The spelling of 11993574191 in words is "eleven billion, nine hundred ninety-three million, five hundred seventy-four thousand, one hundred ninety-one".