3967063581 has 32 divisors (see below), whose sum is σ = 5753735680. Its totient is φ = 2431166400.

The previous prime is 3967063579. The next prime is 3967063603. The reversal of 3967063581 is 1853607693.

It is a happy number.

It is not a de Polignac number, because 3967063581 - 2¹ = 3967063579 is a prime.

It is a super-2 number, since 2×3967063581² = 31475186911393087122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3967063581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3967063511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1785051 + ... + 1787271.

It is an arithmetic number, because the mean of its divisors is an integer number (179804240).

Almost surely, 2^3967063581 is an apocalyptic number.

It is an amenable number.

3967063581 is a deficient number, since it is larger than the sum of its proper divisors (1786672099).

3967063581 is a wasteful number, since it uses less digits than its factorization.

3967063581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534 (or 2508 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 3967063581 is about 62984.6297202738. The cubic root of 3967063581 is about 1583.0320962750.

The spelling of 3967063581 in words is "three billion, nine hundred sixty-seven million, sixty-three thousand, five hundred eighty-one".