128436593 has 2 divisors, whose sum is σ = 128436594. Its totient is φ = 128436592.

The previous prime is 128436589. The next prime is 128436601. The reversal of 128436593 is 395634821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125171344 + 3265249 = 11188^2 + 1807^2 .

It is a cyclic number.

It is not a de Polignac number, because 128436593 - 2² = 128436589 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128436593.

It is not a weakly prime, because it can be changed into another prime (128436533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64218296 + 64218297.

It is an arithmetic number, because the mean of its divisors is an integer number (64218297).

Almost surely, 2^128436593 is an apocalyptic number.

It is an amenable number.

128436593 is a deficient number, since it is larger than the sum of its proper divisors (1).

128436593 is an equidigital number, since it uses as much as digits as its factorization.

128436593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 128436593 is about 11332.9869407849. The cubic root of 128436593 is about 504.5407621269.

The spelling of 128436593 in words is "one hundred twenty-eight million, four hundred thirty-six thousand, five hundred ninety-three".