273540649 has 2 divisors, whose sum is σ = 273540650. Its totient is φ = 273540648.

The previous prime is 273540613. The next prime is 273540661. The reversal of 273540649 is 946045372.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 270372249 + 3168400 = 16443^2 + 1780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-273540649 is a prime.

It is not a weakly prime, because it can be changed into another prime (273540349) 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, 136770324 + 136770325.

It is an arithmetic number, because the mean of its divisors is an integer number (136770325).

Almost surely, 2^273540649 is an apocalyptic number.

It is an amenable number.

273540649 is a deficient number, since it is larger than the sum of its proper divisors (1).

273540649 is an equidigital number, since it uses as much as digits as its factorization.

273540649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 273540649 is about 16539.0643326640. The cubic root of 273540649 is about 649.1433677965.

The spelling of 273540649 in words is "two hundred seventy-three million, five hundred forty thousand, six hundred forty-nine".