128653091 has 4 divisors (see below), whose sum is σ = 147032112. Its totient is φ = 110274072.

The previous prime is 128653079. The next prime is 128653117. The reversal of 128653091 is 190356821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190356821 = 101 ⋅1884721.

It is a cyclic number.

It is not a de Polignac number, because 128653091 - 2¹⁰ = 128652067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128653051) 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, 9189500 + ... + 9189513.

It is an arithmetic number, because the mean of its divisors is an integer number (36758028).

Almost surely, 2^128653091 is an apocalyptic number.

128653091 is a deficient number, since it is larger than the sum of its proper divisors (18379021).

128653091 is an equidigital number, since it uses as much as digits as its factorization.

128653091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18379020.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 128653091 is about 11342.5345932909. The cubic root of 128653091 is about 504.8240945361.

The spelling of 128653091 in words is "one hundred twenty-eight million, six hundred fifty-three thousand, ninety-one".