2987791 has 2 divisors, whose sum is σ = 2987792. Its totient is φ = 2987790.

The previous prime is 2987773. The next prime is 2987821. The reversal of 2987791 is 1977892.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2987791 - 2⁹ = 2987279 is a prime.

It is a pancake number, because a pancake can be divided into 2987791 parts by 2444 straight cuts.

2987791 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2987771) 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, 1493895 + 1493896.

It is an arithmetic number, because the mean of its divisors is an integer number (1493896).

2^2987791 is an apocalyptic number.

2987791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2987791 is an equidigital number, since it uses as much as digits as its factorization.

2987791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 43.

The square root of 2987791 is about 1728.5227797168. The cubic root of 2987791 is about 144.0290418534.

The spelling of 2987791 in words is "two million, nine hundred eighty-seven thousand, seven hundred ninety-one".