2881691 has 4 divisors (see below), whose sum is σ = 2892912. Its totient is φ = 2870472.

The previous prime is 2881657. The next prime is 2881699. The reversal of 2881691 is 1961882.

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 2881691 - 2¹⁴ = 2865307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2881699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5216 + ... + 5741.

It is an arithmetic number, because the mean of its divisors is an integer number (723228).

2^2881691 is an apocalyptic number.

2881691 is a deficient number, since it is larger than the sum of its proper divisors (11221).

2881691 is a wasteful number, since it uses less digits than its factorization.

2881691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11220.

The product of its digits is 6912, while the sum is 35.

The square root of 2881691 is about 1697.5544173899. The cubic root of 2881691 is about 142.3035725952.

The spelling of 2881691 in words is "two million, eight hundred eighty-one thousand, six hundred ninety-one".