983639961 has 6 divisors (see below), whose sum is σ = 1420813290. Its totient is φ = 655759968.

The previous prime is 983639953. The next prime is 983639983. The reversal of 983639961 is 169936389.

983639961 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., 585398025 + 398241936 = 24195^2 + 19956^2 .

It is not a de Polignac number, because 983639961 - 2³ = 983639953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 983639898 and 983639907.

It is not an unprimeable number, because it can be changed into a prime (983632961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54646656 + ... + 54646673.

It is an arithmetic number, because the mean of its divisors is an integer number (236802215).

Almost surely, 2^983639961 is an apocalyptic number.

It is an amenable number.

983639961 is a deficient number, since it is larger than the sum of its proper divisors (437173329).

983639961 is a wasteful number, since it uses less digits than its factorization.

983639961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109293335 (or 109293332 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 983639961 is about 31363.0349456171. The cubic root of 983639961 is about 994.5166414016.

The spelling of 983639961 in words is "nine hundred eighty-three million, six hundred thirty-nine thousand, nine hundred sixty-one".