2729831691 has 16 divisors (see below), whose sum is σ = 3674860064. Its totient is φ = 1802421504.

The previous prime is 2729831681. The next prime is 2729831711. The reversal of 2729831691 is 1961389272.

It is not a de Polignac number, because 2729831691 - 2⁷ = 2729831563 is a prime.

It is a super-2 number, since 2×2729831691² = 14903962122375838962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2729831691.

It is not an unprimeable number, because it can be changed into a prime (2729831681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138165 + ... + 156681.

It is an arithmetic number, because the mean of its divisors is an integer number (229678754).

Almost surely, 2^2729831691 is an apocalyptic number.

2729831691 is a deficient number, since it is larger than the sum of its proper divisors (945028373).

2729831691 is a wasteful number, since it uses less digits than its factorization.

2729831691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18990.

The product of its digits is 326592, while the sum is 48.

The square root of 2729831691 is about 52247.7912547507. The cubic root of 2729831691 is about 1397.5862645175.

The spelling of 2729831691 in words is "two billion, seven hundred twenty-nine million, eight hundred thirty-one thousand, six hundred ninety-one".