3971678491 has 8 divisors (see below), whose sum is σ = 4472506368. Its totient is φ = 3494145000.

The previous prime is 3971678419. The next prime is 3971678507. The reversal of 3971678491 is 1948761793.

3971678491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3971678491 - 2⁹ = 3971677979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3971678591) 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, 5823235 + ... + 5823916.

It is an arithmetic number, because the mean of its divisors is an integer number (559063296).

Almost surely, 2^3971678491 is an apocalyptic number.

3971678491 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3971678491 is a deficient number, since it is larger than the sum of its proper divisors (500827877).

3971678491 is a wasteful number, since it uses less digits than its factorization.

3971678491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11647193.

The product of its digits is 2286144, while the sum is 55.

The square root of 3971678491 is about 63021.2542798063. The cubic root of 3971678491 is about 1583.6457087928.

The spelling of 3971678491 in words is "three billion, nine hundred seventy-one million, six hundred seventy-eight thousand, four hundred ninety-one".