978841 has 4 divisors (see below), whose sum is σ = 981684. Its totient is φ = 976000.

The previous prime is 978839. The next prime is 978851. The reversal of 978841 is 148879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 148879 = 23 ⋅6473.

It can be written as a sum of positive squares in 2 ways, for example, as 594441 + 384400 = 771^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 978841 - 2¹ = 978839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 978841.

It is a congruent 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, 820 + ... + 1621.

It is an arithmetic number, because the mean of its divisors is an integer number (245421).

2⁹⁷⁸⁸⁴¹ is an apocalyptic number.

It is an amenable number.

978841 is a deficient number, since it is larger than the sum of its proper divisors (2843).

978841 is a wasteful number, since it uses less digits than its factorization.

978841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842.

The product of its digits is 16128, while the sum is 37.

The square root of 978841 is about 989.3639370828. The cubic root of 978841 is about 99.2896662062.

The spelling of 978841 in words is "nine hundred seventy-eight thousand, eight hundred forty-one".