947082809 has 8 divisors (see below), whose sum is σ = 963640320. Its totient is φ = 930542256.

The previous prime is 947082793. The next prime is 947082827. The reversal of 947082809 is 908280749.

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 947082809 - 2⁴ = 947082793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (947085809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169352 + ... + 174854.

It is an arithmetic number, because the mean of its divisors is an integer number (120455040).

Almost surely, 2^947082809 is an apocalyptic number.

It is an amenable number.

947082809 is a deficient number, since it is larger than the sum of its proper divisors (16557511).

947082809 is a wasteful number, since it uses less digits than its factorization.

947082809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8479.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 947082809 is about 30774.7105429117. The cubic root of 947082809 is about 982.0403170896.

The spelling of 947082809 in words is "nine hundred forty-seven million, eighty-two thousand, eight hundred nine".