12899671 has 2 divisors, whose sum is σ = 12899672. Its totient is φ = 12899670.

The previous prime is 12899659. The next prime is 12899687. The reversal of 12899671 is 17699821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12899671 - 2⁵ = 12899639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12899371) 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, 6449835 + 6449836.

It is an arithmetic number, because the mean of its divisors is an integer number (6449836).

Almost surely, 2^12899671 is an apocalyptic number.

12899671 is a deficient number, since it is larger than the sum of its proper divisors (1).

12899671 is an equidigital number, since it uses as much as digits as its factorization.

12899671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 43.

The square root of 12899671 is about 3591.6111983343. The cubic root of 12899671 is about 234.5270160711.

It can be divided in two parts, 128 and 99671, that added together give a palindrome (99799).

The spelling of 12899671 in words is "twelve million, eight hundred ninety-nine thousand, six hundred seventy-one".