978876673 has 4 divisors (see below), whose sum is σ = 978998020. Its totient is φ = 978755328.

The previous prime is 978876667. The next prime is 978876683. The reversal of 978876673 is 376678879.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 507465729 + 471410944 = 22527^2 + 21712^2 .

It is a cyclic number.

It is not a de Polignac number, because 978876673 - 2⁵ = 978876641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978876653) 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, 47640 + ... + 65017.

It is an arithmetic number, because the mean of its divisors is an integer number (244749505).

Almost surely, 2^978876673 is an apocalyptic number.

It is an amenable number.

978876673 is a deficient number, since it is larger than the sum of its proper divisors (121347).

978876673 is a wasteful number, since it uses less digits than its factorization.

978876673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121346.

The product of its digits is 21337344, while the sum is 61.

The square root of 978876673 is about 31287.0048582475. The cubic root of 978876673 is about 992.9087236644.

The spelling of 978876673 in words is "nine hundred seventy-eight million, eight hundred seventy-six thousand, six hundred seventy-three".