275704721 has 8 divisors (see below), whose sum is σ = 279822120. Its totient is φ = 271596672.

The previous prime is 275704697. The next prime is 275704733. The reversal of 275704721 is 127407572.

It can be written as a sum of positive squares in 4 ways, for example, as 83466496 + 192238225 = 9136^2 + 13865^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-275704721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (275704621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76271 + ... + 79803.

It is an arithmetic number, because the mean of its divisors is an integer number (34977765).

Almost surely, 2^275704721 is an apocalyptic number.

It is an amenable number.

275704721 is a deficient number, since it is larger than the sum of its proper divisors (4117399).

275704721 is a wasteful number, since it uses less digits than its factorization.

275704721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4675.

The product of its (nonzero) digits is 27440, while the sum is 35.

The square root of 275704721 is about 16604.3584940822. The cubic root of 275704721 is about 650.8507369351.

The spelling of 275704721 in words is "two hundred seventy-five million, seven hundred four thousand, seven hundred twenty-one".