3999889993 has 8 divisors (see below), whose sum is σ = 4394910240. Its totient is φ = 3610102080.

The previous prime is 3999889973. The next prime is 3999890023.

It is a happy number.

3999889993 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3999889993 is a prime.

It is a super-2 number, since 2×3999889993² = 31998239912203080098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3999889973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1306480 + ... + 1309537.

It is an arithmetic number, because the mean of its divisors is an integer number (549363780).

Almost surely, 2^3999889993 is an apocalyptic number.

It is an amenable number.

3999889993 is a deficient number, since it is larger than the sum of its proper divisors (395020247).

3999889993 is a wasteful number, since it uses less digits than its factorization.

3999889993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616167.

The product of its digits is 306110016, while the sum is 76.

The square root of 3999889993 is about 63244.6835156917. The cubic root of 3999889993 is about 1587.3864997325.

The spelling of 3999889993 in words is "three billion, nine hundred ninety-nine million, eight hundred eighty-nine thousand, nine hundred ninety-three".