128259533 has 2 divisors, whose sum is σ = 128259534. Its totient is φ = 128259532.

The previous prime is 128259529. The next prime is 128259539. The reversal of 128259533 is 335952821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128097124 + 162409 = 11318^2 + 403^2 .

It is an emirp because it is prime and its reverse (335952821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128259533 - 2² = 128259529 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128259539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64129766 + 64129767.

It is an arithmetic number, because the mean of its divisors is an integer number (64129767).

Almost surely, 2^128259533 is an apocalyptic number.

It is an amenable number.

128259533 is a deficient number, since it is larger than the sum of its proper divisors (1).

128259533 is an equidigital number, since it uses as much as digits as its factorization.

128259533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 38.

The square root of 128259533 is about 11325.1725373170. The cubic root of 128259533 is about 504.3088057245.

The spelling of 128259533 in words is "one hundred twenty-eight million, two hundred fifty-nine thousand, five hundred thirty-three".