978867 has 12 divisors (see below), whose sum is σ = 1437904. Its totient is φ = 641520.

The previous prime is 978863. The next prime is 978871. The reversal of 978867 is 768879.

It is an interprime number because it is at equal distance from previous prime (978863) and next prime (978871).

It is not a de Polignac number, because 978867 - 2² = 978863 is a prime.

It is a Duffinian number.

978867 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978867.

It is not an unprimeable number, because it can be changed into a prime (978863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 343 + ... + 1440.

2⁹⁷⁸⁸⁶⁷ is an apocalyptic number.

978867 is a deficient number, since it is larger than the sum of its proper divisors (459037).

978867 is a wasteful number, since it uses less digits than its factorization.

978867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850 (or 1847 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 978867 is about 989.3770767508. The cubic root of 978867 is about 99.2905453100.

The spelling of 978867 in words is "nine hundred seventy-eight thousand, eight hundred sixty-seven".