2821087817 has 2 divisors, whose sum is σ = 2821087818. Its totient is φ = 2821087816.

The previous prime is 2821087807. The next prime is 2821087837. The reversal of 2821087817 is 7187801282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2689044736 + 132043081 = 51856^2 + 11491^2 .

It is a cyclic number.

It is not a de Polignac number, because 2821087817 - 2⁸ = 2821087561 is a prime.

It is not a weakly prime, because it can be changed into another prime (2821087807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410543908 + 1410543909.

It is an arithmetic number, because the mean of its divisors is an integer number (1410543909).

Almost surely, 2^2821087817 is an apocalyptic number.

It is an amenable number.

2821087817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2821087817 is an equidigital number, since it uses as much as digits as its factorization.

2821087817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100352, while the sum is 44.

The square root of 2821087817 is about 53113.9135914498. The cubic root of 2821087817 is about 1412.9892848704.

The spelling of 2821087817 in words is "two billion, eight hundred twenty-one million, eighty-seven thousand, eight hundred seventeen".