728122049 has 2 divisors, whose sum is σ = 728122050. Its totient is φ = 728122048.

The previous prime is 728122037. The next prime is 728122069. The reversal of 728122049 is 940221827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558471424 + 169650625 = 23632^2 + 13025^2 .

It is a cyclic number.

It is not a de Polignac number, because 728122049 - 2⁴ = 728122033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (728122069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364061024 + 364061025.

It is an arithmetic number, because the mean of its divisors is an integer number (364061025).

Almost surely, 2^728122049 is an apocalyptic number.

It is an amenable number.

728122049 is a deficient number, since it is larger than the sum of its proper divisors (1).

728122049 is an equidigital number, since it uses as much as digits as its factorization.

728122049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 728122049 is about 26983.7367501241. The cubic root of 728122049 is about 899.6385581558.

The spelling of 728122049 in words is "seven hundred twenty-eight million, one hundred twenty-two thousand, forty-nine".