276065969 has 2 divisors, whose sum is σ = 276065970. Its totient is φ = 276065968.

The previous prime is 276065947. The next prime is 276065971. The reversal of 276065969 is 969560672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276058225 + 7744 = 16615^2 + 88^2 .

It is a cyclic number.

It is not a de Polignac number, because 276065969 - 2¹² = 276061873 is a prime.

It is a super-2 number, since 2×276065969² = 152424838479817922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 276065971, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (276025969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138032984 + 138032985.

It is an arithmetic number, because the mean of its divisors is an integer number (138032985).

Almost surely, 2^276065969 is an apocalyptic number.

It is an amenable number.

276065969 is a deficient number, since it is larger than the sum of its proper divisors (1).

276065969 is an equidigital number, since it uses as much as digits as its factorization.

276065969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The square root of 276065969 is about 16615.2330407972. The cubic root of 276065969 is about 651.1348765649.

The spelling of 276065969 in words is "two hundred seventy-six million, sixty-five thousand, nine hundred sixty-nine".