128877193 has 8 divisors (see below), whose sum is σ = 131220648. Its totient is φ = 126549504.

The previous prime is 128877163. The next prime is 128877197. The reversal of 128877193 is 391778821.

It can be written as a sum of positive squares in 4 ways, for example, as 915849 + 127961344 = 957^2 + 11312^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128877193 - 2⁹ = 128876681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128877197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13221 + ... + 20797.

It is an arithmetic number, because the mean of its divisors is an integer number (16402581).

Almost surely, 2^128877193 is an apocalyptic number.

It is an amenable number.

128877193 is a deficient number, since it is larger than the sum of its proper divisors (2343455).

128877193 is an equidigital number, since it uses as much as digits as its factorization.

128877193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7883.

The product of its digits is 169344, while the sum is 46.

The square root of 128877193 is about 11352.4091275817. The cubic root of 128877193 is about 505.1170437461.

The spelling of 128877193 in words is "one hundred twenty-eight million, eight hundred seventy-seven thousand, one hundred ninety-three".