128850529 has 2 divisors, whose sum is σ = 128850530. Its totient is φ = 128850528.

The previous prime is 128850503. The next prime is 128850541. The reversal of 128850529 is 925058821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93566929 + 35283600 = 9673^2 + 5940^2 .

It is a cyclic number.

It is not a de Polignac number, because 128850529 - 2¹⁵ = 128817761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128850491 and 128850500.

It is not a weakly prime, because it can be changed into another prime (128850569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64425264 + 64425265.

It is an arithmetic number, because the mean of its divisors is an integer number (64425265).

Almost surely, 2^128850529 is an apocalyptic number.

It is an amenable number.

128850529 is a deficient number, since it is larger than the sum of its proper divisors (1).

128850529 is an equidigital number, since it uses as much as digits as its factorization.

128850529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 128850529 is about 11351.2346905524. The cubic root of 128850529 is about 505.0822060077.

The spelling of 128850529 in words is "one hundred twenty-eight million, eight hundred fifty thousand, five hundred twenty-nine".