27778713 has 4 divisors (see below), whose sum is σ = 37038288. Its totient is φ = 18519140.

The previous prime is 27778711. The next prime is 27778717. The reversal of 27778713 is 31787772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27778713 - 2¹ = 27778711 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27778711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4629783 + ... + 4629788.

It is an arithmetic number, because the mean of its divisors is an integer number (9259572).

Almost surely, 2^27778713 is an apocalyptic number.

It is an amenable number.

27778713 is a deficient number, since it is larger than the sum of its proper divisors (9259575).

27778713 is an equidigital number, since it uses as much as digits as its factorization.

27778713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9259574.

The product of its digits is 115248, while the sum is 42.

The square root of 27778713 is about 5270.5514891707. The cubic root of 27778713 is about 302.8568309237.

The spelling of 27778713 in words is "twenty-seven million, seven hundred seventy-eight thousand, seven hundred thirteen".