276890065 has 4 divisors (see below), whose sum is σ = 332268084. Its totient is φ = 221512048.

The previous prime is 276890063. The next prime is 276890069. The reversal of 276890065 is 560098672.

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 165714129 + 111175936 = 12873^2 + 10544^2 .

It is a cyclic number.

It is not a de Polignac number, because 276890065 - 2¹ = 276890063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (276890063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27689002 + ... + 27689011.

It is an arithmetic number, because the mean of its divisors is an integer number (83067021).

Almost surely, 2^276890065 is an apocalyptic number.

It is an amenable number.

276890065 is a deficient number, since it is larger than the sum of its proper divisors (55378019).

276890065 is an equidigital number, since it uses as much as digits as its factorization.

276890065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55378018.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 276890065 is about 16640.0139723499. The cubic root of 276890065 is about 651.7821428601.

The spelling of 276890065 in words is "two hundred seventy-six million, eight hundred ninety thousand, sixty-five".