276730561 has 4 divisors (see below), whose sum is σ = 276765124. Its totient is φ = 276696000.

The previous prime is 276730529. The next prime is 276730577. The reversal of 276730561 is 165037672.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 159138225 + 117592336 = 12615^2 + 10844^2 .

It is a cyclic number.

It is not a de Polignac number, because 276730561 - 2⁵ = 276730529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 276730561.

It is not an unprimeable number, because it can be changed into a prime (276734561) 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 in 3 ways as a sum of consecutive naturals, for example, 1621 + ... + 23581.

It is an arithmetic number, because the mean of its divisors is an integer number (69191281).

Almost surely, 2^276730561 is an apocalyptic number.

It is an amenable number.

276730561 is a deficient number, since it is larger than the sum of its proper divisors (34563).

276730561 is a wasteful number, since it uses less digits than its factorization.

276730561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34562.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 276730561 is about 16635.2204974867. The cubic root of 276730561 is about 651.6569646263.

The spelling of 276730561 in words is "two hundred seventy-six million, seven hundred thirty thousand, five hundred sixty-one".