6816129 has 8 divisors (see below), whose sum is σ = 9129120. Its totient is φ = 4523616.

The previous prime is 6816113. The next prime is 6816137. The reversal of 6816129 is 9216186.

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

It is not a de Polignac number, because 6816129 - 2⁴ = 6816113 is a prime.

It is a super-2 number, since 2×6816129² = 92919229089282, which contains 22 as substring.

6816129 is a modest number, since divided by 6129 gives 681 as remainder.

It is a Curzon number.

6816129 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6816129.

It is not an unprimeable number, because it can be changed into a prime (6816109) 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, 4324 + ... + 5685.

It is an arithmetic number, because the mean of its divisors is an integer number (1141140).

Almost surely, 2^6816129 is an apocalyptic number.

It is an amenable number.

6816129 is a deficient number, since it is larger than the sum of its proper divisors (2312991).

6816129 is a wasteful number, since it uses less digits than its factorization.

6816129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10239.

The product of its digits is 5184, while the sum is 33.

The square root of 6816129 is about 2610.7717249886. The cubic root of 6816129 is about 189.6033182759.

It can be divided in two parts, 681 and 6129, that multiplied together give a square (4173849 = 2043²).

The spelling of 6816129 in words is "six million, eight hundred sixteen thousand, one hundred twenty-nine".