12956899 has 4 divisors (see below), whose sum is σ = 12965536. Its totient is φ = 12948264.

The previous prime is 12956863. The next prime is 12956903. The reversal of 12956899 is 99865921.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 99865921 = 89 ⋅1122089.

It is a cyclic number.

It is not a de Polignac number, because 12956899 - 2¹³ = 12948707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12956809) 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, 1419 + ... + 5284.

It is an arithmetic number, because the mean of its divisors is an integer number (3241384).

Almost surely, 2^12956899 is an apocalyptic number.

12956899 is a deficient number, since it is larger than the sum of its proper divisors (8637).

12956899 is an equidigital number, since it uses as much as digits as its factorization.

12956899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8636.

The product of its digits is 349920, while the sum is 49.

The square root of 12956899 is about 3599.5692797889. The cubic root of 12956899 is about 234.8733224008.

The spelling of 12956899 in words is "twelve million, nine hundred fifty-six thousand, eight hundred ninety-nine".