978326317 has 4 divisors (see below), whose sum is σ = 978398716. Its totient is φ = 978253920.

The previous prime is 978326309. The next prime is 978326329. The reversal of 978326317 is 713623879.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 703893961 + 274432356 = 26531^2 + 16566^2 .

It is a cyclic number.

It is not a de Polignac number, because 978326317 - 2³ = 978326309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978326717) 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, 9234 + ... + 45187.

It is an arithmetic number, because the mean of its divisors is an integer number (244599679).

Almost surely, 2^978326317 is an apocalyptic number.

It is an amenable number.

978326317 is a deficient number, since it is larger than the sum of its proper divisors (72399).

978326317 is a wasteful number, since it uses less digits than its factorization.

978326317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72398.

The product of its digits is 381024, while the sum is 46.

The square root of 978326317 is about 31278.2083406323. The cubic root of 978326317 is about 992.7226070228.

It can be divided in two parts, 9783 and 26317, that added together give a square (36100 = 190²).

The spelling of 978326317 in words is "nine hundred seventy-eight million, three hundred twenty-six thousand, three hundred seventeen".