276563 has 4 divisors (see below), whose sum is σ = 316080. Its totient is φ = 237048.

The previous prime is 276557. The next prime is 276581. The reversal of 276563 is 365672.

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

It is not a de Polignac number, because 276563 - 2⁶ = 276499 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (276503) 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, 19748 + ... + 19761.

It is an arithmetic number, because the mean of its divisors is an integer number (79020).

2²⁷⁶⁵⁶³ is an apocalyptic number.

276563 is a deficient number, since it is larger than the sum of its proper divisors (39517).

276563 is an equidigital number, since it uses as much as digits as its factorization.

276563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39516.

The product of its digits is 7560, while the sum is 29.

The square root of 276563 is about 525.8925745815. The cubic root of 276563 is about 65.1525411467.

The spelling of 276563 in words is "two hundred seventy-six thousand, five hundred sixty-three".