273121649 has 2 divisors, whose sum is σ = 273121650. Its totient is φ = 273121648.

The previous prime is 273121631. The next prime is 273121663. The reversal of 273121649 is 946121372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152275600 + 120846049 = 12340^2 + 10993^2 .

It is a cyclic number.

It is not a de Polignac number, because 273121649 - 2⁸ = 273121393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (273121699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136560824 + 136560825.

It is an arithmetic number, because the mean of its divisors is an integer number (136560825).

Almost surely, 2^273121649 is an apocalyptic number.

It is an amenable number.

273121649 is a deficient number, since it is larger than the sum of its proper divisors (1).

273121649 is an equidigital number, since it uses as much as digits as its factorization.

273121649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 35.

The square root of 273121649 is about 16526.3924980620. The cubic root of 273121649 is about 648.8117533840.

The spelling of 273121649 in words is "two hundred seventy-three million, one hundred twenty-one thousand, six hundred forty-nine".