802128449 has 2 divisors, whose sum is σ = 802128450. Its totient is φ = 802128448.

The previous prime is 802128413. The next prime is 802128499. The reversal of 802128449 is 944821208.

802128449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655718449 + 146410000 = 25607^2 + 12100^2 .

It is a cyclic number.

It is not a de Polignac number, because 802128449 - 2¹² = 802124353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (802128409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401064224 + 401064225.

It is an arithmetic number, because the mean of its divisors is an integer number (401064225).

Almost surely, 2^802128449 is an apocalyptic number.

It is an amenable number.

802128449 is a deficient number, since it is larger than the sum of its proper divisors (1).

802128449 is an equidigital number, since it uses as much as digits as its factorization.

802128449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 802128449 is about 28321.8722721504. The cubic root of 802128449 is about 929.1403197616.

The spelling of 802128449 in words is "eight hundred two million, one hundred twenty-eight thousand, four hundred forty-nine".