11543491 has 2 divisors, whose sum is σ = 11543492. Its totient is φ = 11543490.

The previous prime is 11543443. The next prime is 11543503. The reversal of 11543491 is 19434511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11543491 is a prime.

It is not a weakly prime, because it can be changed into another prime (11540491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5771745 + 5771746.

It is an arithmetic number, because the mean of its divisors is an integer number (5771746).

Almost surely, 2^11543491 is an apocalyptic number.

11543491 is a deficient number, since it is larger than the sum of its proper divisors (1).

11543491 is an equidigital number, since it uses as much as digits as its factorization.

11543491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 11543491 is about 3397.5713384711. The cubic root of 11543491 is about 226.0020557413.

The spelling of 11543491 in words is "eleven million, five hundred forty-three thousand, four hundred ninety-one".