128580983 has 4 divisors (see below), whose sum is σ = 133014840. Its totient is φ = 124147128.

The previous prime is 128580967. The next prime is 128580989. The reversal of 128580983 is 389085821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 389085821 = 37 ⋅10515833.

It is a cyclic number.

It is not a de Polignac number, because 128580983 - 2⁴ = 128580967 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 (128580989) 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, 2216885 + ... + 2216942.

It is an arithmetic number, because the mean of its divisors is an integer number (33253710).

Almost surely, 2^128580983 is an apocalyptic number.

128580983 is a deficient number, since it is larger than the sum of its proper divisors (4433857).

128580983 is an equidigital number, since it uses as much as digits as its factorization.

128580983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4433856.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 128580983 is about 11339.3554931486. The cubic root of 128580983 is about 504.7297616327.

The spelling of 128580983 in words is "one hundred twenty-eight million, five hundred eighty thousand, nine hundred eighty-three".