272128569 has 4 divisors (see below), whose sum is σ = 362838096. Its totient is φ = 181419044.

The previous prime is 272128567. The next prime is 272128589. The reversal of 272128569 is 965821272.

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 272128569 - 2¹ = 272128567 is a prime.

It is a super-2 number, since 2×272128569² = 148107916131975522, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 272128569.

It is not an unprimeable number, because it can be changed into a prime (272128567) 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, 45354759 + ... + 45354764.

It is an arithmetic number, because the mean of its divisors is an integer number (90709524).

Almost surely, 2^272128569 is an apocalyptic number.

It is an amenable number.

272128569 is a deficient number, since it is larger than the sum of its proper divisors (90709527).

272128569 is an equidigital number, since it uses as much as digits as its factorization.

272128569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90709526.

The product of its digits is 120960, while the sum is 42.

The square root of 272128569 is about 16496.3198623208. The cubic root of 272128569 is about 648.0244308538.

The spelling of 272128569 in words is "two hundred seventy-two million, one hundred twenty-eight thousand, five hundred sixty-nine".