3999669993 has 96 divisors (see below), whose sum is σ = 6893078400. Its totient is φ = 2208384000.

The previous prime is 3999669979. The next prime is 3999669997.

3999669993 is a `hidden beast` number, since 399 + 9 + 66 + 99 + 93 = 666.

3999669993 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 3999669993 - 2⁴ = 3999669977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3999669997) 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 95 ways as a sum of consecutive naturals, for example, 7029013 + ... + 7029581.

It is an arithmetic number, because the mean of its divisors is an integer number (71802900).

Almost surely, 2^3999669993 is an apocalyptic number.

3999669993 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

3999669993 is a deficient number, since it is larger than the sum of its proper divisors (2893408407).

3999669993 is a wasteful number, since it uses less digits than its factorization.

3999669993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743 (or 740 counting only the distinct ones).

The product of its digits is 172186884, while the sum is 72.

The square root of 3999669993 is about 63242.9442151455. The cubic root of 3999669993 is about 1587.3573963127.

The spelling of 3999669993 in words is "three billion, nine hundred ninety-nine million, six hundred sixty-nine thousand, nine hundred ninety-three".