3243873981 has 4 divisors (see below), whose sum is σ = 4325165312. Its totient is φ = 2162582652.

The previous prime is 3243873961. The next prime is 3243873991. The reversal of 3243873981 is 1893783423.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3243873981 - 2²⁵ = 3210319549 is a prime.

It is a super-2 number, since 2×3243873981² = 21045436809217576722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3243873981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3243873901) by changing a digit.

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, 540645661 + ... + 540645666.

It is an arithmetic number, because the mean of its divisors is an integer number (1081291328).

Almost surely, 2^3243873981 is an apocalyptic number.

It is an amenable number.

3243873981 is a deficient number, since it is larger than the sum of its proper divisors (1081291331).

3243873981 is a wasteful number, since it uses less digits than its factorization.

3243873981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081291330.

The product of its digits is 870912, while the sum is 48.

The square root of 3243873981 is about 56955.0171714486. The cubic root of 3243873981 is about 1480.3167664132.

The spelling of 3243873981 in words is "three billion, two hundred forty-three million, eight hundred seventy-three thousand, nine hundred eighty-one".