3966993839 has 16 divisors (see below), whose sum is σ = 4285828800. Its totient is φ = 3660577536.

The previous prime is 3966993799. The next prime is 3966993847. The reversal of 3966993839 is 9383996693.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3966993839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3966993139) 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 15 ways as a sum of consecutive naturals, for example, 1274417 + ... + 1277525.

It is an arithmetic number, because the mean of its divisors is an integer number (267864300).

Almost surely, 2^3966993839 is an apocalyptic number.

3966993839 is a deficient number, since it is larger than the sum of its proper divisors (318834961).

3966993839 is a wasteful number, since it uses less digits than its factorization.

3966993839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5074.

The product of its digits is 51018336, while the sum is 65.

The square root of 3966993839 is about 62984.0760748302. The cubic root of 3966993839 is about 1583.0228195166.

The spelling of 3966993839 in words is "three billion, nine hundred sixty-six million, nine hundred ninety-three thousand, eight hundred thirty-nine".