276268409 has 2 divisors, whose sum is σ = 276268410. Its totient is φ = 276268408.

The previous prime is 276268393. The next prime is 276268423. The reversal of 276268409 is 904862672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211062784 + 65205625 = 14528^2 + 8075^2 .

It is a cyclic number.

It is not a de Polignac number, because 276268409 - 2⁴ = 276268393 is a prime.

It is a super-2 number, since 2×276268409² = 152648467622782562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 276268409.

It is not a weakly prime, because it can be changed into another prime (276268439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138134204 + 138134205.

It is an arithmetic number, because the mean of its divisors is an integer number (138134205).

Almost surely, 2^276268409 is an apocalyptic number.

It is an amenable number.

276268409 is a deficient number, since it is larger than the sum of its proper divisors (1).

276268409 is an equidigital number, since it uses as much as digits as its factorization.

276268409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 276268409 is about 16621.3239244051. The cubic root of 276268409 is about 651.2939973935.

The spelling of 276268409 in words is "two hundred seventy-six million, two hundred sixty-eight thousand, four hundred nine".