11493891 has 6 divisors (see below), whose sum is σ = 16602300. Its totient is φ = 7662588.

The previous prime is 11493883. The next prime is 11493913. The reversal of 11493891 is 19839411.

It is not a de Polignac number, because 11493891 - 2³ = 11493883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11493851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 638541 + ... + 638558.

It is an arithmetic number, because the mean of its divisors is an integer number (2767050).

Almost surely, 2^11493891 is an apocalyptic number.

11493891 is a deficient number, since it is larger than the sum of its proper divisors (5108409).

11493891 is a wasteful number, since it uses less digits than its factorization.

11493891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277105 (or 1277102 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 11493891 is about 3390.2641490008. The cubic root of 11493891 is about 225.6778962746.

The spelling of 11493891 in words is "eleven million, four hundred ninety-three thousand, eight hundred ninety-one".