128750239 has 2 divisors, whose sum is σ = 128750240. Its totient is φ = 128750238.

The previous prime is 128750207. The next prime is 128750243. The reversal of 128750239 is 932057821.

It is a strong prime.

It is an emirp because it is prime and its reverse (932057821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128750239 - 2⁵ = 128750207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128750198 and 128750207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128750339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64375119 + 64375120.

It is an arithmetic number, because the mean of its divisors is an integer number (64375120).

Almost surely, 2^128750239 is an apocalyptic number.

128750239 is a deficient number, since it is larger than the sum of its proper divisors (1).

128750239 is an equidigital number, since it uses as much as digits as its factorization.

128750239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 128750239 is about 11346.8162495036. The cubic root of 128750239 is about 504.9511294733.

The spelling of 128750239 in words is "one hundred twenty-eight million, seven hundred fifty thousand, two hundred thirty-nine".