12947807 has 4 divisors (see below), whose sum is σ = 12961200. Its totient is φ = 12934416.

The previous prime is 12947789. The next prime is 12947819. The reversal of 12947807 is 70874921.

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

It is a cyclic number.

It is not a de Polignac number, because 12947807 - 2¹⁴ = 12931423 is a prime.

It is a super-2 number, since 2×12947807² = 335291412218498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12947867) 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, 5123 + ... + 7220.

It is an arithmetic number, because the mean of its divisors is an integer number (3240300).

Almost surely, 2^12947807 is an apocalyptic number.

12947807 is a deficient number, since it is larger than the sum of its proper divisors (13393).

12947807 is a wasteful number, since it uses less digits than its factorization.

12947807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13392.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 12947807 is about 3598.3061292781. The cubic root of 12947807 is about 234.8183718056.

The spelling of 12947807 in words is "twelve million, nine hundred forty-seven thousand, eight hundred seven".