11309631 has 4 divisors (see below), whose sum is σ = 15079512. Its totient is φ = 7539752.

The previous prime is 11309621. The next prime is 11309647. The reversal of 11309631 is 13690311.

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 11309631 - 2⁹ = 11309119 is a prime.

It is a super-2 number, since 2×11309631² = 255815506712322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11309621) 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, 1884936 + ... + 1884941.

It is an arithmetic number, because the mean of its divisors is an integer number (3769878).

Almost surely, 2^11309631 is an apocalyptic number.

11309631 is a deficient number, since it is larger than the sum of its proper divisors (3769881).

11309631 is an equidigital number, since it uses as much as digits as its factorization.

11309631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3769880.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 11309631 is about 3362.9794825422. The cubic root of 11309631 is about 224.4654371455.

Adding to 11309631 its reverse (13690311), we get a palindrome (24999942).

The spelling of 11309631 in words is "eleven million, three hundred nine thousand, six hundred thirty-one".