3946995571 has 4 divisors (see below), whose sum is σ = 4154732200. Its totient is φ = 3739258944.

The previous prime is 3946995557. The next prime is 3946995581. The reversal of 3946995571 is 1755996493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1755996493 = 883 ⋅1988671.

It is a cyclic number.

It is not a de Polignac number, because 3946995571 - 2⁵ = 3946995539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3946995581) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 103868286 + ... + 103868323.

It is an arithmetic number, because the mean of its divisors is an integer number (1038683050).

Almost surely, 2^3946995571 is an apocalyptic number.

3946995571 is a deficient number, since it is larger than the sum of its proper divisors (207736629).

3946995571 is a wasteful number, since it uses less digits than its factorization.

3946995571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207736628.

The product of its digits is 9185400, while the sum is 58.

The square root of 3946995571 is about 62825.1189493502. The cubic root of 3946995571 is about 1580.3582442220.

The spelling of 3946995571 in words is "three billion, nine hundred forty-six million, nine hundred ninety-five thousand, five hundred seventy-one".