128607187 has 8 divisors (see below), whose sum is σ = 129415680. Its totient is φ = 127801920.

The previous prime is 128607173. The next prime is 128607209. The reversal of 128607187 is 781706821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128607187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128607137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156237 + ... + 157057.

It is an arithmetic number, because the mean of its divisors is an integer number (16176960).

Almost surely, 2^128607187 is an apocalyptic number.

128607187 is a deficient number, since it is larger than the sum of its proper divisors (808493).

128607187 is an equidigital number, since it uses as much as digits as its factorization.

128607187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613.

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 128607187 is about 11340.5108791447. The cubic root of 128607187 is about 504.7640462265.

The spelling of 128607187 in words is "one hundred twenty-eight million, six hundred seven thousand, one hundred eighty-seven".