128194067 has 4 divisors (see below), whose sum is σ = 128334480. Its totient is φ = 128053656.

The previous prime is 128194063. The next prime is 128194139. The reversal of 128194067 is 760491821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128194067 - 2² = 128194063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128194067.

It is not an unprimeable number, because it can be changed into a prime (128194061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68828 + ... + 70665.

It is an arithmetic number, because the mean of its divisors is an integer number (32083620).

Almost surely, 2^128194067 is an apocalyptic number.

128194067 is a deficient number, since it is larger than the sum of its proper divisors (140413).

128194067 is an equidigital number, since it uses as much as digits as its factorization.

128194067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140412.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 128194067 is about 11322.2818813170. The cubic root of 128194067 is about 504.2229883243. Note that the first 3 decimals are identical.

The spelling of 128194067 in words is "one hundred twenty-eight million, one hundred ninety-four thousand, sixty-seven".