947816 has 16 divisors (see below), whose sum is σ = 1787940. Its totient is φ = 471040.

The previous prime is 947803. The next prime is 947819. The reversal of 947816 is 618749.

It can be written as a sum of positive squares in 2 ways, for example, as 894916 + 52900 = 946^2 + 230^2 .

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

It is not an unprimeable number, because it can be changed into a prime (947819) by changing a digit.

947816 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1826 + ... + 2286.

2⁹⁴⁷⁸¹⁶ is an apocalyptic number.

It is an amenable number.

947816 is a deficient number, since it is larger than the sum of its proper divisors (840124).

947816 is a wasteful number, since it uses less digits than its factorization.

947816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 720 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 947816 is about 973.5584214622. The cubic root of 947816 is about 98.2293669592.

The spelling of 947816 in words is "nine hundred forty-seven thousand, eight hundred sixteen".