273949381 has 2 divisors, whose sum is σ = 273949382. Its totient is φ = 273949380.

The previous prime is 273949337. The next prime is 273949439. The reversal of 273949381 is 183949372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269288100 + 4661281 = 16410^2 + 2159^2 .

It is a cyclic number.

It is not a de Polignac number, because 273949381 - 2⁷ = 273949253 is a prime.

It is a super-2 number, since 2×273949381² = 150096526700566322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (273943381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136974690 + 136974691.

It is an arithmetic number, because the mean of its divisors is an integer number (136974691).

Almost surely, 2^273949381 is an apocalyptic number.

It is an amenable number.

273949381 is a deficient number, since it is larger than the sum of its proper divisors (1).

273949381 is an equidigital number, since it uses as much as digits as its factorization.

273949381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 273949381 is about 16551.4162838109. The cubic root of 273949381 is about 649.4665295463.

Subtracting from 273949381 its reverse (183949372), we obtain a palindrome (90000009).

The spelling of 273949381 in words is "two hundred seventy-three million, nine hundred forty-nine thousand, three hundred eighty-one".