12678899 has 2 divisors, whose sum is σ = 12678900. Its totient is φ = 12678898.

The previous prime is 12678893. The next prime is 12678929. The reversal of 12678899 is 99887621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12678899 - 2¹² = 12674803 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (12678893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6339449 + 6339450.

It is an arithmetic number, because the mean of its divisors is an integer number (6339450).

Almost surely, 2^12678899 is an apocalyptic number.

12678899 is a deficient number, since it is larger than the sum of its proper divisors (1).

12678899 is an equidigital number, since it uses as much as digits as its factorization.

12678899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 50.

The square root of 12678899 is about 3560.7441637950. The cubic root of 12678899 is about 233.1813688511.

The spelling of 12678899 in words is "twelve million, six hundred seventy-eight thousand, eight hundred ninety-nine".