120728513 has 2 divisors, whose sum is σ = 120728514. Its totient is φ = 120728512.

The previous prime is 120728501. The next prime is 120728533. The reversal of 120728513 is 315827021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85063729 + 35664784 = 9223^2 + 5972^2 .

It is an emirp because it is prime and its reverse (315827021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120728513 - 2⁴ = 120728497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120728533) 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, 60364256 + 60364257.

It is an arithmetic number, because the mean of its divisors is an integer number (60364257).

Almost surely, 2^120728513 is an apocalyptic number.

It is an amenable number.

120728513 is a deficient number, since it is larger than the sum of its proper divisors (1).

120728513 is an equidigital number, since it uses as much as digits as its factorization.

120728513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 120728513 is about 10987.6527520667. The cubic root of 120728513 is about 494.2385503933.

The spelling of 120728513 in words is "one hundred twenty million, seven hundred twenty-eight thousand, five hundred thirteen".