128938543 has 2 divisors, whose sum is σ = 128938544. Its totient is φ = 128938542.

The previous prime is 128938501. The next prime is 128938547. The reversal of 128938543 is 345839821.

It is a strong prime.

It is an emirp because it is prime and its reverse (345839821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128938543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128938543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128938547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64469271 + 64469272.

It is an arithmetic number, because the mean of its divisors is an integer number (64469272).

Almost surely, 2^128938543 is an apocalyptic number.

128938543 is a deficient number, since it is larger than the sum of its proper divisors (1).

128938543 is an equidigital number, since it uses as much as digits as its factorization.

128938543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The square root of 128938543 is about 11355.1108757246. The cubic root of 128938543 is about 505.1971820906.

The spelling of 128938543 in words is "one hundred twenty-eight million, nine hundred thirty-eight thousand, five hundred forty-three".