12331678 has 4 divisors (see below), whose sum is σ = 18497520. Its totient is φ = 6165838.

The previous prime is 12331673. The next prime is 12331679. The reversal of 12331678 is 87613321.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12331673) 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 as a sum of consecutive naturals, namely, 3082918 + ... + 3082921.

It is an arithmetic number, because the mean of its divisors is an integer number (4624380).

Almost surely, 2^12331678 is an apocalyptic number.

12331678 is a deficient number, since it is larger than the sum of its proper divisors (6165842).

12331678 is an equidigital number, since it uses as much as digits as its factorization.

12331678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6165841.

The product of its digits is 6048, while the sum is 31.

The square root of 12331678 is about 3511.6489004455. The cubic root of 12331678 is about 231.0330218967.

Adding to 12331678 its reverse (87613321), we get a palindrome (99944999).

The spelling of 12331678 in words is "twelve million, three hundred thirty-one thousand, six hundred seventy-eight".