128517373 has 2 divisors, whose sum is σ = 128517374. Its totient is φ = 128517372.

The previous prime is 128517359. The next prime is 128517397. The reversal of 128517373 is 373715821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127848249 + 669124 = 11307^2 + 818^2 .

It is an emirp because it is prime and its reverse (373715821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128517373 - 2⁵ = 128517341 is a prime.

It is a super-2 number, since 2×128517373² = 33033430325642258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128517343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64258686 + 64258687.

It is an arithmetic number, because the mean of its divisors is an integer number (64258687).

Almost surely, 2^128517373 is an apocalyptic number.

It is an amenable number.

128517373 is a deficient number, since it is larger than the sum of its proper divisors (1).

128517373 is an equidigital number, since it uses as much as digits as its factorization.

128517373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 128517373 is about 11336.5503130361. The cubic root of 128517373 is about 504.6465166738.

The spelling of 128517373 in words is "one hundred twenty-eight million, five hundred seventeen thousand, three hundred seventy-three".