2805771487 has 2 divisors, whose sum is σ = 2805771488. Its totient is φ = 2805771486.

The previous prime is 2805771421. The next prime is 2805771497. The reversal of 2805771487 is 7841775082.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2805771487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2805771487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2805771497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402885743 + 1402885744.

It is an arithmetic number, because the mean of its divisors is an integer number (1402885744).

Almost surely, 2^2805771487 is an apocalyptic number.

2805771487 is a deficient number, since it is larger than the sum of its proper divisors (1).

2805771487 is an equidigital number, since it uses as much as digits as its factorization.

2805771487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 878080, while the sum is 49.

The square root of 2805771487 is about 52969.5335735553. The cubic root of 2805771487 is about 1410.4274959136.

The spelling of 2805771487 in words is "two billion, eight hundred five million, seven hundred seventy-one thousand, four hundred eighty-seven".