978674 has 4 divisors (see below), whose sum is σ = 1468014. Its totient is φ = 489336.

The previous prime is 978647. The next prime is 978683. The reversal of 978674 is 476879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 476879 = 13 ⋅36683.

It can be written as a sum of positive squares in only one way, i.e., 822649 + 156025 = 907^2 + 395^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978674.

It is an unprimeable number.

978674 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244667 + ... + 244670.

2⁹⁷⁸⁶⁷⁴ is an apocalyptic number.

978674 is a deficient number, since it is larger than the sum of its proper divisors (489340).

978674 is a wasteful number, since it uses less digits than its factorization.

978674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489339.

The product of its digits is 84672, while the sum is 41.

The square root of 978674 is about 989.2795358239. The cubic root of 978674 is about 99.2840192839.

The spelling of 978674 in words is "nine hundred seventy-eight thousand, six hundred seventy-four".