947978 has 16 divisors (see below), whose sum is σ = 1484736. Its totient is φ = 453600.

The previous prime is 947963. The next prime is 947987. The reversal of 947978 is 879749.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 947978.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 6203 + ... + 6353.

It is an arithmetic number, because the mean of its divisors is an integer number (92796).

2⁹⁴⁷⁹⁷⁸ is an apocalyptic number.

947978 is a deficient number, since it is larger than the sum of its proper divisors (536758).

947978 is a wasteful number, since it uses less digits than its factorization.

947978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269.

The product of its digits is 127008, while the sum is 44.

The square root of 947978 is about 973.6416178451. The cubic root of 947978 is about 98.2349630703.

The spelling of 947978 in words is "nine hundred forty-seven thousand, nine hundred seventy-eight".