276216961 has 2 divisors, whose sum is σ = 276216962. Its totient is φ = 276216960.

The previous prime is 276216953. The next prime is 276216977. The reversal of 276216961 is 169612672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147258225 + 128958736 = 12135^2 + 11356^2 .

It is a cyclic number.

It is not a de Polignac number, because 276216961 - 2³ = 276216953 is a prime.

It is not a weakly prime, because it can be changed into another prime (276216911) 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, 138108480 + 138108481.

It is an arithmetic number, because the mean of its divisors is an integer number (138108481).

Almost surely, 2^276216961 is an apocalyptic number.

It is an amenable number.

276216961 is a deficient number, since it is larger than the sum of its proper divisors (1).

276216961 is an equidigital number, since it uses as much as digits as its factorization.

276216961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 276216961 is about 16619.7762018626. The cubic root of 276216961 is about 651.2535658751.

The spelling of 276216961 in words is "two hundred seventy-six million, two hundred sixteen thousand, nine hundred sixty-one".