276743381 has 2 divisors, whose sum is σ = 276743382. Its totient is φ = 276743380.

The previous prime is 276743377. The next prime is 276743393. The reversal of 276743381 is 183347672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244922500 + 31820881 = 15650^2 + 5641^2 .

It is a cyclic number.

It is not a de Polignac number, because 276743381 - 2² = 276743377 is a prime.

It is a super-2 number, since 2×276743381² = 153173797854622322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276743351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138371690 + 138371691.

It is an arithmetic number, because the mean of its divisors is an integer number (138371691).

Almost surely, 2^276743381 is an apocalyptic number.

It is an amenable number.

276743381 is a deficient number, since it is larger than the sum of its proper divisors (1).

276743381 is an equidigital number, since it uses as much as digits as its factorization.

276743381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 41.

The square root of 276743381 is about 16635.6058200476. The cubic root of 276743381 is about 651.6670274990.

The spelling of 276743381 in words is "two hundred seventy-six million, seven hundred forty-three thousand, three hundred eighty-one".