11311291 has 8 divisors (see below), whose sum is σ = 11610864. Its totient is φ = 11015520.

The previous prime is 11311283. The next prime is 11311297. The reversal of 11311291 is 19211311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11311291 - 2³ = 11311283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5661 + ... + 7393.

It is an arithmetic number, because the mean of its divisors is an integer number (1451358).

Almost surely, 2^11311291 is an apocalyptic number.

11311291 is a deficient number, since it is larger than the sum of its proper divisors (299573).

11311291 is a wasteful number, since it uses less digits than its factorization.

11311291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901.

The product of its digits is 54, while the sum is 19.

The square root of 11311291 is about 3363.2262784416. The cubic root of 11311291 is about 224.4764187711.

The spelling of 11311291 in words is "eleven million, three hundred eleven thousand, two hundred ninety-one".