12916331 has 2 divisors, whose sum is σ = 12916332. Its totient is φ = 12916330.

The previous prime is 12916313. The next prime is 12916369. The reversal of 12916331 is 13361921.

12916331 is nontrivially palindromic in base 5.

12916331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (12916313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12916331 - 2²² = 8722027 is a prime.

It is a super-2 number, since 2×12916331² = 333663213003122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12916331.

It is not a weakly prime, because it can be changed into another prime (12916231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6458165 + 6458166.

It is an arithmetic number, because the mean of its divisors is an integer number (6458166).

Almost surely, 2^12916331 is an apocalyptic number.

12916331 is a deficient number, since it is larger than the sum of its proper divisors (1).

12916331 is an equidigital number, since it uses as much as digits as its factorization.

12916331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 26.

The square root of 12916331 is about 3593.9297433311. The cubic root of 12916331 is about 234.6279369713.

The spelling of 12916331 in words is "twelve million, nine hundred sixteen thousand, three hundred thirty-one".