2787971 has 2 divisors, whose sum is σ = 2787972. Its totient is φ = 2787970.

The previous prime is 2787947. The next prime is 2787977. The reversal of 2787971 is 1797872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2787971 - 2⁶ = 2787907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2787977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1393985 + 1393986.

It is an arithmetic number, because the mean of its divisors is an integer number (1393986).

2^2787971 is an apocalyptic number.

2787971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2787971 is an equidigital number, since it uses as much as digits as its factorization.

2787971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 41.

The square root of 2787971 is about 1669.7218331207. The cubic root of 2787971 is about 140.7438469211.

Subtracting from 2787971 its reverse (1797872), we obtain a palindrome (990099).

The spelling of 2787971 in words is "two million, seven hundred eighty-seven thousand, nine hundred seventy-one".