272938409 has 2 divisors, whose sum is σ = 272938410. Its totient is φ = 272938408.

The previous prime is 272938357. The next prime is 272938469. The reversal of 272938409 is 904839272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154455184 + 118483225 = 12428^2 + 10885^2 .

It is a cyclic number.

It is not a de Polignac number, because 272938409 - 2²⁰ = 271889833 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

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 272938409.

It is not a weakly prime, because it can be changed into another prime (272938469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136469204 + 136469205.

It is an arithmetic number, because the mean of its divisors is an integer number (136469205).

Almost surely, 2^272938409 is an apocalyptic number.

It is an amenable number.

272938409 is a deficient number, since it is larger than the sum of its proper divisors (1).

272938409 is an equidigital number, since it uses as much as digits as its factorization.

272938409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 272938409 is about 16520.8477082745. The cubic root of 272938409 is about 648.6666228609. Note that the first 4 decimals are identical.

The spelling of 272938409 in words is "two hundred seventy-two million, nine hundred thirty-eight thousand, four hundred nine".