2781887 has 2 divisors, whose sum is σ = 2781888. Its totient is φ = 2781886.

The previous prime is 2781853. The next prime is 2781901. The reversal of 2781887 is 7881872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2781887 - 2²⁰ = 1733311 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 (2781817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390943 + 1390944.

It is an arithmetic number, because the mean of its divisors is an integer number (1390944).

2^2781887 is an apocalyptic number.

2781887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781887 is an equidigital number, since it uses as much as digits as its factorization.

2781887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50176, while the sum is 41.

The square root of 2781887 is about 1667.8989777561. The cubic root of 2781887 is about 140.6413937760.

The spelling of 2781887 in words is "two million, seven hundred eighty-one thousand, eight hundred eighty-seven".