3800009999 has 4 divisors (see below), whose sum is σ = 3845793336. Its totient is φ = 3754226664.

The previous prime is 3800009987. The next prime is 3800010007. The reversal of 3800009999 is 9999000083.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3800009999 is a prime.

It is a super-3 number, since 3×3800009999³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

3800009999 is a modest number, since divided by 9999 gives 38 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3800009909) 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 3 ways as a sum of consecutive naturals, for example, 22891544 + ... + 22891709.

It is an arithmetic number, because the mean of its divisors is an integer number (961448334).

Almost surely, 2^3800009999 is an apocalyptic number.

3800009999 is a deficient number, since it is larger than the sum of its proper divisors (45783337).

3800009999 is an equidigital number, since it uses as much as digits as its factorization.

3800009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45783336.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 3800009999 is about 61644.2211322359. The cubic root of 3800009999 is about 1560.4921194213.

The spelling of 3800009999 in words is "three billion, eight hundred million, nine thousand, nine hundred ninety-nine".