978893 has 4 divisors (see below), whose sum is σ = 984060. Its totient is φ = 973728.

The previous prime is 978883. The next prime is 978907. The reversal of 978893 is 398879.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 644809 + 334084 = 803^2 + 578^2 .

It is a cyclic number.

It is not a de Polignac number, because 978893 - 2¹⁴ = 962509 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978893.

It is not an unprimeable number, because it can be changed into a prime (978853) 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, 2288 + ... + 2681.

It is an arithmetic number, because the mean of its divisors is an integer number (246015).

2⁹⁷⁸⁸⁹³ is an apocalyptic number.

It is an amenable number.

978893 is a deficient number, since it is larger than the sum of its proper divisors (5167).

978893 is a wasteful number, since it uses less digits than its factorization.

978893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5166.

The product of its digits is 108864, while the sum is 44.

The square root of 978893 is about 989.3902162443. The cubic root of 978893 is about 99.2914243982.

The spelling of 978893 in words is "nine hundred seventy-eight thousand, eight hundred ninety-three".