3981769843 has 4 divisors (see below), whose sum is σ = 4026508920. Its totient is φ = 3937030768.

The previous prime is 3981769823. The next prime is 3981769877. The reversal of 3981769843 is 3489671893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3489671893 = 51521 ⋅67733.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3981769843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3981769823) 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, 22369405 + ... + 22369582.

It is an arithmetic number, because the mean of its divisors is an integer number (1006627230).

Almost surely, 2^3981769843 is an apocalyptic number.

3981769843 is a deficient number, since it is larger than the sum of its proper divisors (44739077).

3981769843 is an equidigital number, since it uses as much as digits as its factorization.

3981769843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44739076.

The product of its digits is 7838208, while the sum is 58.

The square root of 3981769843 is about 63101.2665720744. The cubic root of 3981769843 is about 1584.9858315564.

The spelling of 3981769843 in words is "three billion, nine hundred eighty-one million, seven hundred sixty-nine thousand, eight hundred forty-three".