1971643483 has 4 divisors (see below), whose sum is σ = 1972701400. Its totient is φ = 1970585568.

The previous prime is 1971643451. The next prime is 1971643501. The reversal of 1971643483 is 3843461791.

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

It is a cyclic number.

It is not a de Polignac number, because 1971643483 - 2⁵ = 1971643451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1971640483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526158 + ... + 529891.

It is an arithmetic number, because the mean of its divisors is an integer number (493175350).

Almost surely, 2^1971643483 is an apocalyptic number.

1971643483 is a deficient number, since it is larger than the sum of its proper divisors (1057917).

1971643483 is a wasteful number, since it uses less digits than its factorization.

1971643483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057916.

The product of its digits is 435456, while the sum is 46.

The square root of 1971643483 is about 44403.1922613679. The cubic root of 1971643483 is about 1253.9381892091.

The spelling of 1971643483 in words is "one billion, nine hundred seventy-one million, six hundred forty-three thousand, four hundred eighty-three".