978601 has 4 divisors (see below), whose sum is σ = 1053892. Its totient is φ = 903312.

The previous prime is 978599. The next prime is 978611. The reversal of 978601 is 106879.

978601 = 699² + 700².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106879 = 17 ⋅6287.

It can be written as a sum of positive squares in 2 ways, for example, as 488601 + 490000 = 699^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 978601 - 2¹ = 978599 is a prime.

It is a Duffinian number.

978601 is a lucky number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (978611) 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, 37626 + ... + 37651.

It is an arithmetic number, because the mean of its divisors is an integer number (263473).

2⁹⁷⁸⁶⁰¹ is an apocalyptic number.

978601 is the 700-th centered square number.

It is an amenable number.

978601 is a deficient number, since it is larger than the sum of its proper divisors (75291).

978601 is a wasteful number, since it uses less digits than its factorization.

978601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75290.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 978601 is about 989.2426395986. The cubic root of 978601 is about 99.2815506669.

The spelling of 978601 in words is "nine hundred seventy-eight thousand, six hundred one".