2871129491 has 4 divisors (see below), whose sum is σ = 2995961232. Its totient is φ = 2746297752.

The previous prime is 2871129487. The next prime is 2871129523. The reversal of 2871129491 is 1949211782.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2871129491 - 2² = 2871129487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2871129421) 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 3 ways as a sum of consecutive naturals, for example, 62415836 + ... + 62415881.

It is an arithmetic number, because the mean of its divisors is an integer number (748990308).

Almost surely, 2^2871129491 is an apocalyptic number.

2871129491 is a deficient number, since it is larger than the sum of its proper divisors (124831741).

2871129491 is a wasteful number, since it uses less digits than its factorization.

2871129491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124831740.

The product of its digits is 72576, while the sum is 44.

The square root of 2871129491 is about 53582.9216355361. The cubic root of 2871129491 is about 1421.2951040721.

The spelling of 2871129491 in words is "two billion, eight hundred seventy-one million, one hundred twenty-nine thousand, four hundred ninety-one".