128613471 has 8 divisors (see below), whose sum is σ = 195982464. Its totient is φ = 73493400.

The previous prime is 128613467. The next prime is 128613481. The reversal of 128613471 is 174316821.

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

It is not a de Polignac number, because 128613471 - 2² = 128613467 is a prime.

It is a super-3 number, since 3×128613471³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128613421) 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, 3062205 + ... + 3062246.

It is an arithmetic number, because the mean of its divisors is an integer number (24497808).

Almost surely, 2^128613471 is an apocalyptic number.

128613471 is a deficient number, since it is larger than the sum of its proper divisors (67368993).

128613471 is an equidigital number, since it uses as much as digits as its factorization.

128613471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6124461.

The product of its digits is 8064, while the sum is 33.

The square root of 128613471 is about 11340.7879355890. The cubic root of 128613471 is about 504.7722673472.

The spelling of 128613471 in words is "one hundred twenty-eight million, six hundred thirteen thousand, four hundred seventy-one".