983665978 has 12 divisors (see below), whose sum is σ = 1542441978. Its totient is φ = 470448440.

The previous prime is 983665957. The next prime is 983665981. The reversal of 983665978 is 879566389.

983665978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 841174009 + 142491969 = 29003^2 + 11937^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 463813 + ... + 465928.

Almost surely, 2^983665978 is an apocalyptic number.

983665978 is a deficient number, since it is larger than the sum of its proper divisors (558776000).

983665978 is a wasteful number, since it uses less digits than its factorization.

983665978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929789 (or 929766 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 61.

The square root of 983665978 is about 31363.4497145961. The cubic root of 983665978 is about 994.5254095527.

The spelling of 983665978 in words is "nine hundred eighty-three million, six hundred sixty-five thousand, nine hundred seventy-eight".