128350517 has 2 divisors, whose sum is σ = 128350518. Its totient is φ = 128350516.

The previous prime is 128350513. The next prime is 128350559. The reversal of 128350517 is 715053821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120318961 + 8031556 = 10969^2 + 2834^2 .

It is a cyclic number.

It is not a de Polignac number, because 128350517 - 2² = 128350513 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128350513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64175258 + 64175259.

It is an arithmetic number, because the mean of its divisors is an integer number (64175259).

Almost surely, 2^128350517 is an apocalyptic number.

It is an amenable number.

128350517 is a deficient number, since it is larger than the sum of its proper divisors (1).

128350517 is an equidigital number, since it uses as much as digits as its factorization.

128350517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 128350517 is about 11329.1887176443. The cubic root of 128350517 is about 504.4280254190.

The spelling of 128350517 in words is "one hundred twenty-eight million, three hundred fifty thousand, five hundred seventeen".