6738986999 has 4 divisors (see below), whose sum is σ = 6739761336. Its totient is φ = 6738212664.

The previous prime is 6738986981. The next prime is 6738987001. The reversal of 6738986999 is 9996898376.

6738986999 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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-6738986999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6738986299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373964 + ... + 391569.

It is an arithmetic number, because the mean of its divisors is an integer number (1684940334).

Almost surely, 2^6738986999 is an apocalyptic number.

6738986999 is a deficient number, since it is larger than the sum of its proper divisors (774337).

6738986999 is an equidigital number, since it uses as much as digits as its factorization.

6738986999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774336.

The product of its digits is 317447424, while the sum is 74.

The square root of 6738986999 is about 82091.3332758093. Note that the first 3 decimals coincide. The cubic root of 6738986999 is about 1888.8531996680.

The spelling of 6738986999 in words is "six billion, seven hundred thirty-eight million, nine hundred eighty-six thousand, nine hundred ninety-nine".