128132647 has 8 divisors (see below), whose sum is σ = 131700096. Its totient is φ = 124591992.

The previous prime is 128132639. The next prime is 128132657. The reversal of 128132647 is 746231821.

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

It is a cyclic number.

It is not a de Polignac number, because 128132647 - 2³ = 128132639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128132617) 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, 3198 + ... + 16324.

It is an arithmetic number, because the mean of its divisors is an integer number (16462512).

Almost surely, 2^128132647 is an apocalyptic number.

128132647 is a deficient number, since it is larger than the sum of its proper divisors (3567449).

128132647 is a wasteful number, since it uses less digits than its factorization.

128132647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13397.

The product of its digits is 16128, while the sum is 34.

The square root of 128132647 is about 11319.5692055838. The cubic root of 128132647 is about 504.1424481350.

The spelling of 128132647 in words is "one hundred twenty-eight million, one hundred thirty-two thousand, six hundred forty-seven".