275743945 has 4 divisors (see below), whose sum is σ = 330892740. Its totient is φ = 220595152.

The previous prime is 275743841. The next prime is 275743957. The reversal of 275743945 is 549347572.

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 209207296 + 66536649 = 14464^2 + 8157^2 .

It is a cyclic number.

It is not a de Polignac number, because 275743945 - 2¹¹ = 275741897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 275743895 and 275743904.

It is an unprimeable number.

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, 27574390 + ... + 27574399.

It is an arithmetic number, because the mean of its divisors is an integer number (82723185).

Almost surely, 2^275743945 is an apocalyptic number.

It is an amenable number.

275743945 is a deficient number, since it is larger than the sum of its proper divisors (55148795).

275743945 is an equidigital number, since it uses as much as digits as its factorization.

275743945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55148794.

The product of its digits is 1058400, while the sum is 46.

The square root of 275743945 is about 16605.5395877400. The cubic root of 275743945 is about 650.8816005812.

The spelling of 275743945 in words is "two hundred seventy-five million, seven hundred forty-three thousand, nine hundred forty-five".