11920591 has 2 divisors, whose sum is σ = 11920592. Its totient is φ = 11920590.

The previous prime is 11920561. The next prime is 11920613. The reversal of 11920591 is 19502911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11920591 - 2⁹ = 11920079 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11920511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5960295 + 5960296.

It is an arithmetic number, because the mean of its divisors is an integer number (5960296).

Almost surely, 2^11920591 is an apocalyptic number.

11920591 is a deficient number, since it is larger than the sum of its proper divisors (1).

11920591 is an equidigital number, since it uses as much as digits as its factorization.

11920591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 11920591 is about 3452.6208885425. The cubic root of 11920591 is about 228.4367270508.

The spelling of 11920591 in words is "eleven million, nine hundred twenty thousand, five hundred ninety-one".