11992291 has 2 divisors, whose sum is σ = 11992292. Its totient is φ = 11992290.

The previous prime is 11992243. The next prime is 11992297. The reversal of 11992291 is 19229911.

It is a strong prime.

It is an emirp because it is prime and its reverse (19229911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11992291 - 2¹⁷ = 11861219 is a prime.

It is not a weakly prime, because it can be changed into another prime (11992297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5996145 + 5996146.

It is an arithmetic number, because the mean of its divisors is an integer number (5996146).

Almost surely, 2^11992291 is an apocalyptic number.

11992291 is a deficient number, since it is larger than the sum of its proper divisors (1).

11992291 is an equidigital number, since it uses as much as digits as its factorization.

11992291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 34.

The square root of 11992291 is about 3462.9887380701. The cubic root of 11992291 is about 228.8938124414.

The spelling of 11992291 in words is "eleven million, nine hundred ninety-two thousand, two hundred ninety-one".