3991674783 has 8 divisors (see below), whose sum is σ = 5635305648. Its totient is φ = 2504580224.

The previous prime is 3991674781. The next prime is 3991674803. The reversal of 3991674783 is 3874761993.

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 3991674783 - 2¹ = 3991674781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991674781) 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, 39134016 + ... + 39134117.

It is an arithmetic number, because the mean of its divisors is an integer number (704413206).

Almost surely, 2^3991674783 is an apocalyptic number.

3991674783 is a deficient number, since it is larger than the sum of its proper divisors (1643630865).

3991674783 is a wasteful number, since it uses less digits than its factorization.

3991674783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78268153.

The product of its digits is 6858432, while the sum is 57.

The square root of 3991674783 is about 63179.7023022426. The cubic root of 3991674783 is about 1586.2989988596.

The spelling of 3991674783 in words is "three billion, nine hundred ninety-one million, six hundred seventy-four thousand, seven hundred eighty-three".