978849 has 6 divisors (see below), whose sum is σ = 1413906. Its totient is φ = 652560.

The previous prime is 978839. The next prime is 978851. The reversal of 978849 is 948879.

It can be written as a sum of positive squares in only one way, i.e., 950625 + 28224 = 975^2 + 168^2 .

It is not a de Polignac number, because 978849 - 2⁹ = 978337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (978839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54372 + ... + 54389.

It is an arithmetic number, because the mean of its divisors is an integer number (235651).

2⁹⁷⁸⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

978849 is a deficient number, since it is larger than the sum of its proper divisors (435057).

978849 is a wasteful number, since it uses less digits than its factorization.

978849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108767 (or 108764 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 978849 is about 989.3679800762. The cubic root of 978849 is about 99.2899367013.

The spelling of 978849 in words is "nine hundred seventy-eight thousand, eight hundred forty-nine".