11149891 has 4 divisors (see below), whose sum is σ = 11534400. Its totient is φ = 10765384.

The previous prime is 11149889. The next prime is 11149927. The reversal of 11149891 is 19894111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11149891 - 2¹ = 11149889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11149811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192211 + ... + 192268.

It is an arithmetic number, because the mean of its divisors is an integer number (2883600).

Almost surely, 2^11149891 is an apocalyptic number.

11149891 is a deficient number, since it is larger than the sum of its proper divisors (384509).

11149891 is an equidigital number, since it uses as much as digits as its factorization.

11149891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384508.

The product of its digits is 2592, while the sum is 34.

The square root of 11149891 is about 3339.1452499105. The cubic root of 11149891 is about 223.4036206085.

The spelling of 11149891 in words is "eleven million, one hundred forty-nine thousand, eight hundred ninety-one".