128599047 has 12 divisors (see below), whose sum is σ = 187092360. Its totient is φ = 85115088.

The previous prime is 128598997. The next prime is 128599073. The reversal of 128599047 is 740995821.

128599047 is a `hidden beast` number, since 12 + 8 + 599 + 0 + 47 = 666.

It is not a de Polignac number, because 128599047 - 2⁶ = 128598983 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 128598993 and 128599011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128599547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50148 + ... + 52649.

It is an arithmetic number, because the mean of its divisors is an integer number (15591030).

Almost surely, 2^128599047 is an apocalyptic number.

128599047 is a deficient number, since it is larger than the sum of its proper divisors (58493313).

128599047 is a wasteful number, since it uses less digits than its factorization.

128599047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102942 (or 102939 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 128599047 is about 11340.1519831085. The cubic root of 128599047 is about 504.7533965728.

The spelling of 128599047 in words is "one hundred twenty-eight million, five hundred ninety-nine thousand, forty-seven".