978947 has 2 divisors, whose sum is σ = 978948. Its totient is φ = 978946.

The previous prime is 978931. The next prime is 978973. The reversal of 978947 is 749879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978947 - 2⁴ = 978931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 978898 and 978907.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978947.

It is not a weakly prime, because it can be changed into another prime (978907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489473 + 489474.

It is an arithmetic number, because the mean of its divisors is an integer number (489474).

2⁹⁷⁸⁹⁴⁷ is an apocalyptic number.

978947 is a deficient number, since it is larger than the sum of its proper divisors (1).

978947 is an equidigital number, since it uses as much as digits as its factorization.

978947 is an odious number, because the sum of its binary digits is odd.

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

The square root of 978947 is about 989.4175054041. The cubic root of 978947 is about 99.2932501471.

The spelling of 978947 in words is "nine hundred seventy-eight thousand, nine hundred forty-seven".