128418539 has 2 divisors, whose sum is σ = 128418540. Its totient is φ = 128418538.

The previous prime is 128418517. The next prime is 128418547. The reversal of 128418539 is 935814821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128418539 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 128418496 and 128418505.

It is not a weakly prime, because it can be changed into another prime (128418559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64209269 + 64209270.

It is an arithmetic number, because the mean of its divisors is an integer number (64209270).

Almost surely, 2^128418539 is an apocalyptic number.

128418539 is a deficient number, since it is larger than the sum of its proper divisors (1).

128418539 is an equidigital number, since it uses as much as digits as its factorization.

128418539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 41.

The square root of 128418539 is about 11332.1903884465. The cubic root of 128418539 is about 504.5171203554.

The spelling of 128418539 in words is "one hundred twenty-eight million, four hundred eighteen thousand, five hundred thirty-nine".