3997879081 has 12 divisors (see below), whose sum is σ = 4653412740. Its totient is φ = 3424676640.

The previous prime is 3997879057. The next prime is 3997879097. The reversal of 3997879081 is 1809787993.

It can be written as a sum of positive squares in 2 ways, for example, as 203319081 + 3794560000 = 14259^2 + 61600^2 .

It is not a de Polignac number, because 3997879081 - 2⁵ = 3997879049 is a prime.

It is a super-2 number, since 2×3997879081² = 31966074292594809122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3997879031) 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 11 ways as a sum of consecutive naturals, for example, 59871 + ... + 107611.

It is an arithmetic number, because the mean of its divisors is an integer number (387784395).

Almost surely, 2^3997879081 is an apocalyptic number.

It is an amenable number.

3997879081 is a deficient number, since it is larger than the sum of its proper divisors (655533659).

3997879081 is a wasteful number, since it uses less digits than its factorization.

3997879081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49464 (or 49457 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 61.

The square root of 3997879081 is about 63228.7836432111. The cubic root of 3997879081 is about 1587.1204399451.

The spelling of 3997879081 in words is "three billion, nine hundred ninety-seven million, eight hundred seventy-nine thousand, eighty-one".