127728753 has 4 divisors (see below), whose sum is σ = 170305008. Its totient is φ = 85152500.

The previous prime is 127728749. The next prime is 127728761. The reversal of 127728753 is 357827721.

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.

It is a cyclic number.

It is not a de Polignac number, because 127728753 - 2² = 127728749 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (127728353) 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, 21288123 + ... + 21288128.

It is an arithmetic number, because the mean of its divisors is an integer number (42576252).

Almost surely, 2^127728753 is an apocalyptic number.

It is an amenable number.

127728753 is a deficient number, since it is larger than the sum of its proper divisors (42576255).

127728753 is an equidigital number, since it uses as much as digits as its factorization.

127728753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42576254.

The product of its digits is 164640, while the sum is 42.

The square root of 127728753 is about 11301.7146044306. The cubic root of 127728753 is about 503.6121788202.

The spelling of 127728753 in words is "one hundred twenty-seven million, seven hundred twenty-eight thousand, seven hundred fifty-three".