978397 has 16 divisors (see below), whose sum is σ = 1198080. Its totient is φ = 780912.

The previous prime is 978389. The next prime is 978403. The reversal of 978397 is 793879.

It is a cyclic number.

It is not a de Polignac number, because 978397 - 2³ = 978389 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9448 + ... + 9550.

It is an arithmetic number, because the mean of its divisors is an integer number (74880).

2⁹⁷⁸³⁹⁷ is an apocalyptic number.

It is an amenable number.

978397 is a deficient number, since it is larger than the sum of its proper divisors (219683).

978397 is a wasteful number, since it uses less digits than its factorization.

978397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192.

The product of its digits is 95256, while the sum is 43.

The square root of 978397 is about 989.1395250418. The cubic root of 978397 is about 99.2746514152.

The spelling of 978397 in words is "nine hundred seventy-eight thousand, three hundred ninety-seven".