11910391 has 2 divisors, whose sum is σ = 11910392. Its totient is φ = 11910390.

The previous prime is 11910361. The next prime is 11910401. The reversal of 11910391 is 19301911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11910391 - 2⁹ = 11909879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11910341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5955195 + 5955196.

It is an arithmetic number, because the mean of its divisors is an integer number (5955196).

Almost surely, 2^11910391 is an apocalyptic number.

11910391 is a deficient number, since it is larger than the sum of its proper divisors (1).

11910391 is an equidigital number, since it uses as much as digits as its factorization.

11910391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 25.

The square root of 11910391 is about 3451.1434337043. The cubic root of 11910391 is about 228.3715535620.

The spelling of 11910391 in words is "eleven million, nine hundred ten thousand, three hundred ninety-one".