1971163984 has 20 divisors (see below), whose sum is σ = 3821653216. Its totient is φ = 984930912.

The previous prime is 1971163979. The next prime is 1971164023. The reversal of 1971163984 is 4893611791.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15234 + ... + 64609.

Almost surely, 2^1971163984 is an apocalyptic number.

It is an amenable number.

1971163984 is a deficient number, since it is larger than the sum of its proper divisors (1850489232).

1971163984 is a wasteful number, since it uses less digits than its factorization.

1971163984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81394 (or 81388 counting only the distinct ones).

The product of its digits is 326592, while the sum is 49.

The square root of 1971163984 is about 44397.7925577387. The cubic root of 1971163984 is about 1253.8365293737.

The spelling of 1971163984 in words is "one billion, nine hundred seventy-one million, one hundred sixty-three thousand, nine hundred eighty-four".