978994 has 8 divisors (see below), whose sum is σ = 1545840. Its totient is φ = 463716.

The previous prime is 978973. The next prime is 978997. The reversal of 978994 is 499879.

978994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (978997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12844 + ... + 12919.

It is an arithmetic number, because the mean of its divisors is an integer number (193230).

2⁹⁷⁸⁹⁹⁴ is an apocalyptic number.

978994 is a deficient number, since it is larger than the sum of its proper divisors (566846).

978994 is a wasteful number, since it uses less digits than its factorization.

978994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25784.

The product of its digits is 163296, while the sum is 46.

The square root of 978994 is about 989.4412564675. The cubic root of 978994 is about 99.2948391701.

It can be divided in two parts, 97899 and 4, that added together give a triangular number (97903 = T₄₄₂).

The spelling of 978994 in words is "nine hundred seventy-eight thousand, nine hundred ninety-four".