128536317 has 24 divisors (see below), whose sum is σ = 228510464. Its totient is φ = 67798944.

The previous prime is 128536313. The next prime is 128536321. The reversal of 128536317 is 713635821.

128536317 is a `hidden beast` number, since 1 + 285 + 363 + 17 = 666.

It is an interprime number because it is at equal distance from previous prime (128536313) and next prime (128536321).

It is not a de Polignac number, because 128536317 - 2² = 128536313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128536313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77653 + ... + 79290.

Almost surely, 2^128536317 is an apocalyptic number.

It is an amenable number.

128536317 is a deficient number, since it is larger than the sum of its proper divisors (99974147).

128536317 is a wasteful number, since it uses less digits than its factorization.

128536317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156969 (or 156966 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 128536317 is about 11337.3858097888. The cubic root of 128536317 is about 504.6713111269.

The spelling of 128536317 in words is "one hundred twenty-eight million, five hundred thirty-six thousand, three hundred seventeen".