12947089 has 4 divisors (see below), whose sum is σ = 13075380. Its totient is φ = 12818800.

The previous prime is 12947071. The next prime is 12947101. The reversal of 12947089 is 98074921.

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 12780625 + 166464 = 3575^2 + 408^2 .

It is a cyclic number.

It is not a de Polignac number, because 12947089 - 2¹³ = 12938897 is a prime.

It is a super-2 number, since 2×12947089² = 335254227147842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12947029) 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, 63994 + ... + 64195.

It is an arithmetic number, because the mean of its divisors is an integer number (3268845).

Almost surely, 2^12947089 is an apocalyptic number.

It is an amenable number.

12947089 is a deficient number, since it is larger than the sum of its proper divisors (128291).

12947089 is a wasteful number, since it uses less digits than its factorization.

12947089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128290.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 12947089 is about 3598.2063587293. The cubic root of 12947089 is about 234.8140312325.

The spelling of 12947089 in words is "twelve million, nine hundred forty-seven thousand, eighty-nine".