273138389 has 4 divisors (see below), whose sum is σ = 273736524. Its totient is φ = 272540256.

The previous prime is 273138379. The next prime is 273138401. The reversal of 273138389 is 983831372.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180015889 + 93122500 = 13417^2 + 9650^2 .

It is a cyclic number.

It is not a de Polignac number, because 273138389 - 2⁴ = 273138373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (273138379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298382 + ... + 299295.

It is an arithmetic number, because the mean of its divisors is an integer number (68434131).

Almost surely, 2^273138389 is an apocalyptic number.

It is an amenable number.

273138389 is a deficient number, since it is larger than the sum of its proper divisors (598135).

273138389 is an equidigital number, since it uses as much as digits as its factorization.

273138389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598134.

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

The square root of 273138389 is about 16526.8989529191. The cubic root of 273138389 is about 648.8250086335.

The spelling of 273138389 in words is "two hundred seventy-three million, one hundred thirty-eight thousand, three hundred eighty-nine".