273736381 has 2 divisors, whose sum is σ = 273736382. Its totient is φ = 273736380.

The previous prime is 273736373. The next prime is 273736429. The reversal of 273736381 is 183637372.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267028281 + 6708100 = 16341^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 273736381 - 2³ = 273736373 is a prime.

It is a super-2 number, since 2×273736381² = 149863212565954322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (273736081) 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 as a sum of consecutive naturals, namely, 136868190 + 136868191.

It is an arithmetic number, because the mean of its divisors is an integer number (136868191).

Almost surely, 2^273736381 is an apocalyptic number.

It is an amenable number.

273736381 is a deficient number, since it is larger than the sum of its proper divisors (1).

273736381 is an equidigital number, since it uses as much as digits as its factorization.

273736381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 40.

The square root of 273736381 is about 16544.9805379154. The cubic root of 273736381 is about 649.2981623846.

Subtracting from 273736381 its reverse (183637372), we obtain a palindrome (90099009).

The spelling of 273736381 in words is "two hundred seventy-three million, seven hundred thirty-six thousand, three hundred eighty-one".