11497809 has 4 divisors (see below), whose sum is σ = 15330416. Its totient is φ = 7665204.

The previous prime is 11497799. The next prime is 11497817. The reversal of 11497809 is 90879411.

It is a happy number.

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 not a de Polignac number, because 11497809 - 2⁸ = 11497553 is a prime.

It is a super-2 number, since 2×11497809² = 264399223600962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11497819) 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 3 ways as a sum of consecutive naturals, for example, 1916299 + ... + 1916304.

It is an arithmetic number, because the mean of its divisors is an integer number (3832604).

Almost surely, 2^11497809 is an apocalyptic number.

It is an amenable number.

11497809 is a deficient number, since it is larger than the sum of its proper divisors (3832607).

11497809 is an equidigital number, since it uses as much as digits as its factorization.

11497809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3832606.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 11497809 is about 3390.8419308484. The cubic root of 11497809 is about 225.7035361428.

The spelling of 11497809 in words is "eleven million, four hundred ninety-seven thousand, eight hundred nine".