2489823221 has 2 divisors, whose sum is σ = 2489823222. Its totient is φ = 2489823220.

The previous prime is 2489823199. The next prime is 2489823283. The reversal of 2489823221 is 1223289842.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1790220721 + 699602500 = 42311^2 + 26450^2 .

It is a cyclic number.

It is not a de Polignac number, because 2489823221 - 2⁶ = 2489823157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2489823121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1244911610 + 1244911611.

It is an arithmetic number, because the mean of its divisors is an integer number (1244911611).

Almost surely, 2^2489823221 is an apocalyptic number.

It is an amenable number.

2489823221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2489823221 is an equidigital number, since it uses as much as digits as its factorization.

2489823221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 41.

The square root of 2489823221 is about 49898.1284318360. The cubic root of 2489823221 is about 1355.3647018743.

The spelling of 2489823221 in words is "two billion, four hundred eighty-nine million, eight hundred twenty-three thousand, two hundred twenty-one".