11291291 has 4 divisors (see below), whose sum is σ = 12317784. Its totient is φ = 10264800.

The previous prime is 11291261. The next prime is 11291297. The reversal of 11291291 is 19219211.

11291291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19219211 = 11 ⋅1747201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11291291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11291291.

It is not an unprimeable number, because it can be changed into a prime (11291297) 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, 513230 + ... + 513251.

It is an arithmetic number, because the mean of its divisors is an integer number (3079446).

Almost surely, 2^11291291 is an apocalyptic number.

11291291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11291291 is a deficient number, since it is larger than the sum of its proper divisors (1026493).

11291291 is a wasteful number, since it uses less digits than its factorization.

11291291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026492.

The product of its digits is 324, while the sum is 26.

The square root of 11291291 is about 3360.2516274827. The cubic root of 11291291 is about 224.3440384494.

The spelling of 11291291 in words is "eleven million, two hundred ninety-one thousand, two hundred ninety-one".