33047947 has 4 divisors (see below), whose sum is σ = 33092136. Its totient is φ = 33003760.

The previous prime is 33047929. The next prime is 33047957. The reversal of 33047947 is 74974033.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33047947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33047957) 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, 20953 + ... + 22474.

It is an arithmetic number, because the mean of its divisors is an integer number (8273034).

Almost surely, 2^33047947 is an apocalyptic number.

33047947 is a deficient number, since it is larger than the sum of its proper divisors (44189).

33047947 is an equidigital number, since it uses as much as digits as its factorization.

33047947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44188.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 33047947 is about 5748.7343824532. The cubic root of 33047947 is about 320.9087029241.

The spelling of 33047947 in words is "thirty-three million, forty-seven thousand, nine hundred forty-seven".