11288993 has 4 divisors (see below), whose sum is σ = 11352240. Its totient is φ = 11225748.

The previous prime is 11288923. The next prime is 11288999. The reversal of 11288993 is 39988211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11288993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11288993.

It is not an unprimeable number, because it can be changed into a prime (11288999) 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, 31355 + ... + 31712.

It is an arithmetic number, because the mean of its divisors is an integer number (2838060).

Almost surely, 2^11288993 is an apocalyptic number.

It is an amenable number.

11288993 is a deficient number, since it is larger than the sum of its proper divisors (63247).

11288993 is an equidigital number, since it uses as much as digits as its factorization.

11288993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63246.

The product of its digits is 31104, while the sum is 41.

The square root of 11288993 is about 3359.9096714049. The cubic root of 11288993 is about 224.3288179407.

The spelling of 11288993 in words is "eleven million, two hundred eighty-eight thousand, nine hundred ninety-three".