6876721129 has 6 divisors (see below), whose sum is σ = 7257703290. Its totient is φ = 6514788096.

The previous prime is 6876721127. The next prime is 6876721151. The reversal of 6876721129 is 9211276786.

It can be written as a sum of positive squares in only one way, i.e., 6343803904 + 532917225 = 79648^2 + 23085^2 .

It is not a de Polignac number, because 6876721129 - 2¹ = 6876721127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6876721127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9524184 + ... + 9524905.

It is an arithmetic number, because the mean of its divisors is an integer number (1209617215).

Almost surely, 2^6876721129 is an apocalyptic number.

It is an amenable number.

6876721129 is a deficient number, since it is larger than the sum of its proper divisors (380982161).

6876721129 is a wasteful number, since it uses less digits than its factorization.

6876721129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19049127 (or 19049108 counting only the distinct ones).

The product of its digits is 508032, while the sum is 49.

The square root of 6876721129 is about 82925.9979077732. The cubic root of 6876721129 is about 1901.6348928204.

The spelling of 6876721129 in words is "six billion, eight hundred seventy-six million, seven hundred twenty-one thousand, one hundred twenty-nine".