978965 has 8 divisors (see below), whose sum is σ = 1265208. Its totient is φ = 722880.

The previous prime is 978947. The next prime is 978973. The reversal of 978965 is 569879.

978965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 70756 + 908209 = 266^2 + 953^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-978965 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7466 + ... + 7595.

It is an arithmetic number, because the mean of its divisors is an integer number (158151).

2⁹⁷⁸⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

978965 is a deficient number, since it is larger than the sum of its proper divisors (286243).

978965 is a wasteful number, since it uses less digits than its factorization.

978965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15079.

The product of its digits is 136080, while the sum is 44.

The square root of 978965 is about 989.4266016234. The cubic root of 978965 is about 99.2938587151.

The spelling of 978965 in words is "nine hundred seventy-eight thousand, nine hundred sixty-five".