11231691 has 4 divisors (see below), whose sum is σ = 14975592. Its totient is φ = 7487792.

The previous prime is 11231677. The next prime is 11231699. The reversal of 11231691 is 19613211.

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 11231691 - 2¹⁴ = 11215307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11231699) 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, 1871946 + ... + 1871951.

It is an arithmetic number, because the mean of its divisors is an integer number (3743898).

Almost surely, 2^11231691 is an apocalyptic number.

11231691 is a deficient number, since it is larger than the sum of its proper divisors (3743901).

11231691 is an equidigital number, since it uses as much as digits as its factorization.

11231691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743900.

The product of its digits is 324, while the sum is 24.

The square root of 11231691 is about 3351.3715102925. The cubic root of 11231691 is about 223.9486157115.

The spelling of 11231691 in words is "eleven million, two hundred thirty-one thousand, six hundred ninety-one".