978687323 has 6 divisors (see below), whose sum is σ = 985234572. Its totient is φ = 972183300.

The previous prime is 978687319. The next prime is 978687349. The reversal of 978687323 is 323786879.

It is a happy number.

It is not a de Polignac number, because 978687323 - 2² = 978687319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978687383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1340 + ... + 44262.

It is an arithmetic number, because the mean of its divisors is an integer number (164205762).

Almost surely, 2^978687323 is an apocalyptic number.

978687323 is a deficient number, since it is larger than the sum of its proper divisors (6547249).

978687323 is an equidigital number, since it uses as much as digits as its factorization.

978687323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43225 (or 43074 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 53.

The square root of 978687323 is about 31283.9786951724. The cubic root of 978687323 is about 992.8446981013.

The spelling of 978687323 in words is "nine hundred seventy-eight million, six hundred eighty-seven thousand, three hundred twenty-three".