275799905 has 4 divisors (see below), whose sum is σ = 330959892. Its totient is φ = 220639920.

The previous prime is 275799899. The next prime is 275799911. The reversal of 275799905 is 509997572.

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

It is an interprime number because it is at equal distance from previous prime (275799899) and next prime (275799911).

It can be written as a sum of positive squares in 2 ways, for example, as 165276736 + 110523169 = 12856^2 + 10513^2 .

It is not a de Polignac number, because 275799905 - 2⁶ = 275799841 is a prime.

It is a Duffinian number.

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, 27579986 + ... + 27579995.

It is an arithmetic number, because the mean of its divisors is an integer number (82739973).

Almost surely, 2^275799905 is an apocalyptic number.

It is an amenable number.

275799905 is a deficient number, since it is larger than the sum of its proper divisors (55159987).

275799905 is an equidigital number, since it uses as much as digits as its factorization.

275799905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55159986.

The product of its (nonzero) digits is 1786050, while the sum is 53.

The square root of 275799905 is about 16607.2244821343. The cubic root of 275799905 is about 650.9256279858.

The spelling of 275799905 in words is "two hundred seventy-five million, seven hundred ninety-nine thousand, nine hundred five".