27809713 has 8 divisors (see below), whose sum is σ = 28096200. Its totient is φ = 27525120.

The previous prime is 27809707. The next prime is 27809819. The reversal of 27809713 is 31790872.

It can be written as a sum of positive squares in 4 ways, for example, as 17363889 + 10445824 = 4167^2 + 3232^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27809713 - 2¹⁷ = 27678641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27809113) 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 7 ways as a sum of consecutive naturals, for example, 61713 + ... + 62161.

It is an arithmetic number, because the mean of its divisors is an integer number (3512025).

Almost surely, 2^27809713 is an apocalyptic number.

It is an amenable number.

27809713 is a deficient number, since it is larger than the sum of its proper divisors (286487).

27809713 is a wasteful number, since it uses less digits than its factorization.

27809713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 27809713 is about 5273.4915378713. The cubic root of 27809713 is about 302.9694479900.

The spelling of 27809713 in words is "twenty-seven million, eight hundred nine thousand, seven hundred thirteen".