128517203 has 2 divisors, whose sum is σ = 128517204. Its totient is φ = 128517202.

The previous prime is 128517199. The next prime is 128517251. The reversal of 128517203 is 302715821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128517203 - 2² = 128517199 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128517293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64258601 + 64258602.

It is an arithmetic number, because the mean of its divisors is an integer number (64258602).

Almost surely, 2^128517203 is an apocalyptic number.

128517203 is a deficient number, since it is larger than the sum of its proper divisors (1).

128517203 is an equidigital number, since it uses as much as digits as its factorization.

128517203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 128517203 is about 11336.5428151619. The cubic root of 128517203 is about 504.6462941619.

The spelling of 128517203 in words is "one hundred twenty-eight million, five hundred seventeen thousand, two hundred three".