6729123117 has 4 divisors (see below), whose sum is σ = 8972164160. Its totient is φ = 4486082076.

The previous prime is 6729123109. The next prime is 6729123143. The reversal of 6729123117 is 7113219276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6729123117 - 2³ = 6729123109 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 (6729123187) 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, 1121520517 + ... + 1121520522.

It is an arithmetic number, because the mean of its divisors is an integer number (2243041040).

Almost surely, 2^6729123117 is an apocalyptic number.

It is an amenable number.

6729123117 is a deficient number, since it is larger than the sum of its proper divisors (2243041043).

6729123117 is a wasteful number, since it uses less digits than its factorization.

6729123117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243041042.

The product of its digits is 31752, while the sum is 39.

The square root of 6729123117 is about 82031.2325702839. The cubic root of 6729123117 is about 1887.9311756914.

The spelling of 6729123117 in words is "six billion, seven hundred twenty-nine million, one hundred twenty-three thousand, one hundred seventeen".