12898709 has 4 divisors (see below), whose sum is σ = 12919116. Its totient is φ = 12878304.

The previous prime is 12898703. The next prime is 12898729. The reversal of 12898709 is 90789821.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3319684 + 9579025 = 1822^2 + 3095^2 .

It is a cyclic number.

It is not a de Polignac number, because 12898709 - 2⁴ = 12898693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12898709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12898703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9224 + ... + 10529.

It is an arithmetic number, because the mean of its divisors is an integer number (3229779).

Almost surely, 2^12898709 is an apocalyptic number.

It is an amenable number.

12898709 is a deficient number, since it is larger than the sum of its proper divisors (20407).

12898709 is an equidigital number, since it uses as much as digits as its factorization.

12898709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20406.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 12898709 is about 3591.4772726554. The cubic root of 12898709 is about 234.5211859328.

The spelling of 12898709 in words is "twelve million, eight hundred ninety-eight thousand, seven hundred nine".