3971161326 has 32 divisors (see below), whose sum is σ = 8668573056. Its totient is φ = 1202796000.

The previous prime is 3971161319. The next prime is 3971161333. The reversal of 3971161326 is 6231611793.

It is an interprime number because it is at equal distance from previous prime (3971161319) and next prime (3971161333).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133041 + ... + 160131.

It is an arithmetic number, because the mean of its divisors is an integer number (270892908).

Almost surely, 2^3971161326 is an apocalyptic number.

3971161326 is an abundant number, since it is smaller than the sum of its proper divisors (4697411730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3971161326 is a wasteful number, since it uses less digits than its factorization.

3971161326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29328.

The product of its digits is 40824, while the sum is 39.

The square root of 3971161326 is about 63017.1510463620. The cubic root of 3971161326 is about 1583.5769686128.

The spelling of 3971161326 in words is "three billion, nine hundred seventy-one million, one hundred sixty-one thousand, three hundred twenty-six".