3204998021 has 2 divisors, whose sum is σ = 3204998022. Its totient is φ = 3204998020.

The previous prime is 3204997993. The next prime is 3204998039. The reversal of 3204998021 is 1208994023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3186602500 + 18395521 = 56450^2 + 4289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3204998021 is a prime.

It is a super-2 number, since 2×3204998021² = 20544024629227832882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3204998921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1602499010 + 1602499011.

It is an arithmetic number, because the mean of its divisors is an integer number (1602499011).

Almost surely, 2^3204998021 is an apocalyptic number.

It is an amenable number.

3204998021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3204998021 is an equidigital number, since it uses as much as digits as its factorization.

3204998021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 3204998021 is about 56612.7019404656. The cubic root of 3204998021 is about 1474.3794031589.

The spelling of 3204998021 in words is "three billion, two hundred four million, nine hundred ninety-eight thousand, twenty-one".