978827 has 4 divisors (see below), whose sum is σ = 989016. Its totient is φ = 968640.

The previous prime is 978821. The next prime is 978839. The reversal of 978827 is 728879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 728879 = 521 ⋅1399.

It is a cyclic number.

It is not a de Polignac number, because 978827 - 2¹⁰ = 977803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978821) 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, 4949 + ... + 5142.

It is an arithmetic number, because the mean of its divisors is an integer number (247254).

2⁹⁷⁸⁸²⁷ is an apocalyptic number.

978827 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

978827 is a deficient number, since it is larger than the sum of its proper divisors (10189).

978827 is a wasteful number, since it uses less digits than its factorization.

978827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10188.

The product of its digits is 56448, while the sum is 41.

The square root of 978827 is about 989.3568618047. The cubic root of 978827 is about 99.2891928362.

The spelling of 978827 in words is "nine hundred seventy-eight thousand, eight hundred twenty-seven".