2821402861 has 2 divisors, whose sum is σ = 2821402862. Its totient is φ = 2821402860.

The previous prime is 2821402813. The next prime is 2821402867. The reversal of 2821402861 is 1682041282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2820247236 + 1155625 = 53106^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 2821402861 - 2¹³ = 2821394669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2821402867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410701430 + 1410701431.

It is an arithmetic number, because the mean of its divisors is an integer number (1410701431).

Almost surely, 2^2821402861 is an apocalyptic number.

It is an amenable number.

2821402861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2821402861 is an equidigital number, since it uses as much as digits as its factorization.

2821402861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 2821402861 is about 53116.8792475612. The cubic root of 2821402861 is about 1413.0418812748.

The spelling of 2821402861 in words is "two billion, eight hundred twenty-one million, four hundred two thousand, eight hundred sixty-one".