3971681279 has 4 divisors (see below), whose sum is σ = 4056185184. Its totient is φ = 3887177376.

The previous prime is 3971681267. The next prime is 3971681291. The reversal of 3971681279 is 9721861793.

3971681279 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3971681267) and next prime (3971681291).

It is a cyclic number.

It is not a de Polignac number, because 3971681279 - 2⁸ = 3971681023 is a prime.

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 3971681279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971681249) 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, 42251882 + ... + 42251975.

It is an arithmetic number, because the mean of its divisors is an integer number (1014046296).

Almost surely, 2^3971681279 is an apocalyptic number.

3971681279 is a deficient number, since it is larger than the sum of its proper divisors (84503905).

3971681279 is an equidigital number, since it uses as much as digits as its factorization.

3971681279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84503904.

The product of its digits is 1143072, while the sum is 53.

The square root of 3971681279 is about 63021.2763993241. The cubic root of 3971681279 is about 1583.6460793501.

The spelling of 3971681279 in words is "three billion, nine hundred seventy-one million, six hundred eighty-one thousand, two hundred seventy-nine".