978013 has 4 divisors (see below), whose sum is σ = 994108. Its totient is φ = 961920.

The previous prime is 978011. The next prime is 978017. The reversal of 978013 is 310879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310879 = 17 ⋅18287.

It can be written as a sum of positive squares in 2 ways, for example, as 13689 + 964324 = 117^2 + 982^2 .

It is a cyclic number.

It is not a de Polignac number, because 978013 - 2¹ = 978011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978011) 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 3 ways as a sum of consecutive naturals, for example, 7956 + ... + 8077.

It is an arithmetic number, because the mean of its divisors is an integer number (248527).

2⁹⁷⁸⁰¹³ is an apocalyptic number.

It is an amenable number.

978013 is a deficient number, since it is larger than the sum of its proper divisors (16095).

978013 is a wasteful number, since it uses less digits than its factorization.

978013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16094.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 978013 is about 988.9453978861. The cubic root of 978013 is about 99.2616619864.

The spelling of 978013 in words is "nine hundred seventy-eight thousand, thirteen".