3981492243 has 6 divisors (see below), whose sum is σ = 5751044364. Its totient is φ = 2654328156.

The previous prime is 3981492239. The next prime is 3981492253. The reversal of 3981492243 is 3422941893.

3981492243 is a `hidden beast` number, since 398 + 14 + 9 + 2 + 243 = 666.

3981492243 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3981492243 - 2² = 3981492239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3981492233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221194005 + ... + 221194022.

It is an arithmetic number, because the mean of its divisors is an integer number (958507394).

Almost surely, 2^3981492243 is an apocalyptic number.

3981492243 is a deficient number, since it is larger than the sum of its proper divisors (1769552121).

3981492243 is a wasteful number, since it uses less digits than its factorization.

3981492243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442388033 (or 442388030 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 3981492243 is about 63099.0668948440. The cubic root of 3981492243 is about 1584.9489968230.

The spelling of 3981492243 in words is "three billion, nine hundred eighty-one million, four hundred ninety-two thousand, two hundred forty-three".