273727381 has 2 divisors, whose sum is σ = 273727382. Its totient is φ = 273727380.

The previous prime is 273727343. The next prime is 273727409. The reversal of 273727381 is 183727372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268664881 + 5062500 = 16391^2 + 2250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-273727381 is a prime.

It is a super-2 number, since 2×273727381² = 149853358218238322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (273727481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136863690 + 136863691.

It is an arithmetic number, because the mean of its divisors is an integer number (136863691).

Almost surely, 2^273727381 is an apocalyptic number.

It is an amenable number.

273727381 is a deficient number, since it is larger than the sum of its proper divisors (1).

273727381 is an equidigital number, since it uses as much as digits as its factorization.

273727381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784, while the sum is 40.

The square root of 273727381 is about 16544.7085498657. The cubic root of 273727381 is about 649.2910463563.

Subtracting from 273727381 its reverse (183727372), we obtain a palindrome (90000009).

The spelling of 273727381 in words is "two hundred seventy-three million, seven hundred twenty-seven thousand, three hundred eighty-one".