27954947 has 4 divisors (see below), whose sum is σ = 29426280. Its totient is φ = 26483616.

The previous prime is 27954937. The next prime is 27954961. The reversal of 27954947 is 74945972.

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 27954947 - 2⁴ = 27954931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27954917) 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, 735638 + ... + 735675.

It is an arithmetic number, because the mean of its divisors is an integer number (7356570).

Almost surely, 2^27954947 is an apocalyptic number.

27954947 is a deficient number, since it is larger than the sum of its proper divisors (1471333).

27954947 is a wasteful number, since it uses less digits than its factorization.

27954947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471332.

The product of its digits is 635040, while the sum is 47.

The square root of 27954947 is about 5287.2437999396. The cubic root of 27954947 is about 303.4959437535.

Subtracting 27954947 from its reverse (74945972), we obtain a square (46991025 = 6855²).

The spelling of 27954947 in words is "twenty-seven million, nine hundred fifty-four thousand, nine hundred forty-seven".