978747 has 32 divisors (see below), whose sum is σ = 1720320. Its totient is φ = 479520.

The previous prime is 978743. The next prime is 978749. The reversal of 978747 is 747879.

It is not a de Polignac number, because 978747 - 2² = 978743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 978699 and 978708.

It is not an unprimeable number, because it can be changed into a prime (978743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4278 + ... + 4500.

It is an arithmetic number, because the mean of its divisors is an integer number (53760).

2⁹⁷⁸⁷⁴⁷ is an apocalyptic number.

978747 is a deficient number, since it is larger than the sum of its proper divisors (741573).

978747 is a wasteful number, since it uses less digits than its factorization.

978747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263.

The product of its digits is 98784, while the sum is 42.

The square root of 978747 is about 989.3164306732. The cubic root of 978747 is about 99.2864877781.

The spelling of 978747 in words is "nine hundred seventy-eight thousand, seven hundred forty-seven".