128199733 has 2 divisors, whose sum is σ = 128199734. Its totient is φ = 128199732.

The previous prime is 128199697. The next prime is 128199761. The reversal of 128199733 is 337991821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125955729 + 2244004 = 11223^2 + 1498^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128199733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128199733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128199793) 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, 64099866 + 64099867.

It is an arithmetic number, because the mean of its divisors is an integer number (64099867).

Almost surely, 2^128199733 is an apocalyptic number.

It is an amenable number.

128199733 is a deficient number, since it is larger than the sum of its proper divisors (1).

128199733 is an equidigital number, since it uses as much as digits as its factorization.

128199733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 128199733 is about 11322.5320931318. The cubic root of 128199733 is about 504.2304168671.

The spelling of 128199733 in words is "one hundred twenty-eight million, one hundred ninety-nine thousand, seven hundred thirty-three".