2871691 has 8 divisors (see below), whose sum is σ = 3057264. Its totient is φ = 2688000.

The previous prime is 2871689. The next prime is 2871719. The reversal of 2871691 is 1961782.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2871691 - 2¹ = 2871689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2871611) 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, 3931 + ... + 4603.

It is an arithmetic number, because the mean of its divisors is an integer number (382158).

2^2871691 is an apocalyptic number.

2871691 is a deficient number, since it is larger than the sum of its proper divisors (185573).

2871691 is a wasteful number, since it uses less digits than its factorization.

2871691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941.

The product of its digits is 6048, while the sum is 34.

The square root of 2871691 is about 1694.6064439863. The cubic root of 2871691 is about 142.1387752624.

Subtracting from 2871691 its reverse (1961782), we obtain a palindrome (909909).

The spelling of 2871691 in words is "two million, eight hundred seventy-one thousand, six hundred ninety-one".