978646479 has 8 divisors (see below), whose sum is σ = 1309713840. Its totient is φ = 650005056.

The previous prime is 978646477. The next prime is 978646489. The reversal of 978646479 is 974646879.

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

It is not a de Polignac number, because 978646479 - 2¹ = 978646477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978646477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605542 + ... + 607155.

It is an arithmetic number, because the mean of its divisors is an integer number (163714230).

Almost surely, 2^978646479 is an apocalyptic number.

978646479 is a deficient number, since it is larger than the sum of its proper divisors (331067361).

978646479 is a wasteful number, since it uses less digits than its factorization.

978646479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212969.

The product of its digits is 18289152, while the sum is 60.

The square root of 978646479 is about 31283.3258941565. The cubic root of 978646479 is about 992.8308862971.

It can be divided in two parts, 9786 and 46479, that added together give a palindrome (56265).

The spelling of 978646479 in words is "nine hundred seventy-eight million, six hundred forty-six thousand, four hundred seventy-nine".