276648961 has 4 divisors (see below), whose sum is σ = 277797124. Its totient is φ = 275500800.

The previous prime is 276648959. The next prime is 276648989. The reversal of 276648961 is 169846672.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 106998336 + 169650625 = 10344^2 + 13025^2 .

It is a cyclic number.

It is not a de Polignac number, because 276648961 - 2¹ = 276648959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (276648901) 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 in 3 ways as a sum of consecutive naturals, for example, 573720 + ... + 574201.

It is an arithmetic number, because the mean of its divisors is an integer number (69449281).

Almost surely, 2^276648961 is an apocalyptic number.

It is an amenable number.

276648961 is a deficient number, since it is larger than the sum of its proper divisors (1148163).

276648961 is a wasteful number, since it uses less digits than its factorization.

276648961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148162.

The product of its digits is 870912, while the sum is 49.

The square root of 276648961 is about 16632.7676891130. The cubic root of 276648961 is about 651.5929066058.

The spelling of 276648961 in words is "two hundred seventy-six million, six hundred forty-eight thousand, nine hundred sixty-one".