978673 has 8 divisors (see below), whose sum is σ = 1081728. Its totient is φ = 880704.

The previous prime is 978647. The next prime is 978683. The reversal of 978673 is 376879.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 978673 - 2¹³ = 970481 is a prime.

It is a Duffinian number.

978673 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (978643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 861 + ... + 1642.

It is an arithmetic number, because the mean of its divisors is an integer number (135216).

2⁹⁷⁸⁶⁷³ is an apocalyptic number.

It is an amenable number.

978673 is a deficient number, since it is larger than the sum of its proper divisors (103055).

978673 is a wasteful number, since it uses less digits than its factorization.

978673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2543.

The product of its digits is 63504, while the sum is 40.

The square root of 978673 is about 989.2790304055. The cubic root of 978673 is about 99.2839854680.

The spelling of 978673 in words is "nine hundred seventy-eight thousand, six hundred seventy-three".