128577349 has 4 divisors (see below), whose sum is σ = 128928064. Its totient is φ = 128226636.

The previous prime is 128577277. The next prime is 128577359. The reversal of 128577349 is 943775821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 943775821 = 151 ⋅6250171.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128577349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128577299 and 128577308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128577359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174807 + ... + 175540.

It is an arithmetic number, because the mean of its divisors is an integer number (32232016).

Almost surely, 2^128577349 is an apocalyptic number.

It is an amenable number.

128577349 is a deficient number, since it is larger than the sum of its proper divisors (350715).

128577349 is an equidigital number, since it uses as much as digits as its factorization.

128577349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350714.

The product of its digits is 423360, while the sum is 46.

The square root of 128577349 is about 11339.1952536324. The cubic root of 128577349 is about 504.7250066392.

The spelling of 128577349 in words is "one hundred twenty-eight million, five hundred seventy-seven thousand, three hundred forty-nine".