2891687 has 2 divisors, whose sum is σ = 2891688. Its totient is φ = 2891686.

The previous prime is 2891671. The next prime is 2891701. The reversal of 2891687 is 7861982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2891687 - 2⁴ = 2891671 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2891657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1445843 + 1445844.

It is an arithmetic number, because the mean of its divisors is an integer number (1445844).

2^2891687 is an apocalyptic number.

2891687 is a deficient number, since it is larger than the sum of its proper divisors (1).

2891687 is an equidigital number, since it uses as much as digits as its factorization.

2891687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 2891687 is about 1700.4961040826. The cubic root of 2891687 is about 142.4679234255.

The spelling of 2891687 in words is "two million, eight hundred ninety-one thousand, six hundred eighty-seven".