2905082821 has 2 divisors, whose sum is σ = 2905082822. Its totient is φ = 2905082820.

The previous prime is 2905082797. The next prime is 2905082837. The reversal of 2905082821 is 1282805092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2882186596 + 22896225 = 53686^2 + 4785^2 .

It is a cyclic number.

It is not a de Polignac number, because 2905082821 - 2¹⁵ = 2905050053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2905082891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1452541410 + 1452541411.

It is an arithmetic number, because the mean of its divisors is an integer number (1452541411).

Almost surely, 2^2905082821 is an apocalyptic number.

It is an amenable number.

2905082821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2905082821 is an equidigital number, since it uses as much as digits as its factorization.

2905082821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 2905082821 is about 53898.8202189992. The cubic root of 2905082821 is about 1426.8758013344.

The spelling of 2905082821 in words is "two billion, nine hundred five million, eighty-two thousand, eight hundred twenty-one".