272309 has 4 divisors (see below), whose sum is σ = 273504. Its totient is φ = 271116.

The previous prime is 272299. The next prime is 272317. The reversal of 272309 is 903272.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 272309 - 2⁸ = 272053 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (272329) 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, 137 + ... + 750.

It is an arithmetic number, because the mean of its divisors is an integer number (68376).

2²⁷²³⁰⁹ is an apocalyptic number.

It is an amenable number.

272309 is a deficient number, since it is larger than the sum of its proper divisors (1195).

272309 is an equidigital number, since it uses as much as digits as its factorization.

272309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 272309 is about 521.8323485565. The cubic root of 272309 is about 64.8167620357.

It can be divided in two parts, 272 and 309, that multiplied together give a palindrome (84048).

The spelling of 272309 in words is "two hundred seventy-two thousand, three hundred nine".