272389209 has 4 divisors (see below), whose sum is σ = 363185616. Its totient is φ = 181592804.

The previous prime is 272389193. The next prime is 272389231. The reversal of 272389209 is 902983272.

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 272389209 - 2⁴ = 272389193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (272389009) 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, 45398199 + ... + 45398204.

It is an arithmetic number, because the mean of its divisors is an integer number (90796404).

Almost surely, 2^272389209 is an apocalyptic number.

It is an amenable number.

272389209 is a deficient number, since it is larger than the sum of its proper divisors (90796407).

272389209 is an equidigital number, since it uses as much as digits as its factorization.

272389209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90796406.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 272389209 is about 16504.2179154300. The cubic root of 272389209 is about 648.2312536722.

The spelling of 272389209 in words is "two hundred seventy-two million, three hundred eighty-nine thousand, two hundred nine".