1971163983 has 8 divisors (see below), whose sum is σ = 2665236096. Its totient is φ = 1295600600.

The previous prime is 1971163979. The next prime is 1971164023. The reversal of 1971163983 is 3893611791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1971163983 - 2² = 1971163979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971163483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4626933 + ... + 4627358.

It is an arithmetic number, because the mean of its divisors is an integer number (333154512).

Almost surely, 2^1971163983 is an apocalyptic number.

1971163983 is a deficient number, since it is larger than the sum of its proper divisors (694072113).

1971163983 is an equidigital number, since it uses as much as digits as its factorization.

1971163983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9254365.

The product of its digits is 244944, while the sum is 48.

The square root of 1971163983 is about 44397.7925464769. The cubic root of 1971163983 is about 1253.8365291617.

The spelling of 1971163983 in words is "one billion, nine hundred seventy-one million, one hundred sixty-three thousand, nine hundred eighty-three".