27874947 has 4 divisors (see below), whose sum is σ = 37166600. Its totient is φ = 18583296.

The previous prime is 27874939. The next prime is 27874961. The reversal of 27874947 is 74947872.

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

It is not a de Polignac number, because 27874947 - 2³ = 27874939 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27874896 and 27874905.

It is not an unprimeable number, because it can be changed into a prime (27874907) 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, 4645822 + ... + 4645827.

It is an arithmetic number, because the mean of its divisors is an integer number (9291650).

Almost surely, 2^27874947 is an apocalyptic number.

27874947 is a deficient number, since it is larger than the sum of its proper divisors (9291653).

27874947 is an equidigital number, since it uses as much as digits as its factorization.

27874947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9291652.

The product of its digits is 790272, while the sum is 48.

The square root of 27874947 is about 5279.6730012379. The cubic root of 27874947 is about 303.2061575586.

The spelling of 27874947 in words is "twenty-seven million, eight hundred seventy-four thousand, nine hundred forty-seven".