12663431 has 4 divisors (see below), whose sum is σ = 13814664. Its totient is φ = 11512200.

The previous prime is 12663403. The next prime is 12663433. The reversal of 12663431 is 13436621.

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 12663431 - 2¹⁸ = 12401287 is a prime.

It is a super-2 number, since 2×12663431² = 320724969383522, which contains 22 as substring.

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 12663431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12663433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575600 + ... + 575621.

It is an arithmetic number, because the mean of its divisors is an integer number (3453666).

Almost surely, 2^12663431 is an apocalyptic number.

12663431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12663431 is a deficient number, since it is larger than the sum of its proper divisors (1151233).

12663431 is a wasteful number, since it uses less digits than its factorization.

12663431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151232.

The product of its digits is 2592, while the sum is 26.

The square root of 12663431 is about 3558.5714830533. The cubic root of 12663431 is about 233.0865047473.

The spelling of 12663431 in words is "twelve million, six hundred sixty-three thousand, four hundred thirty-one".