276823 has 2 divisors, whose sum is σ = 276824. Its totient is φ = 276822.

The previous prime is 276821. The next prime is 276827. The reversal of 276823 is 328672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 276823 - 2¹ = 276821 is a prime.

Together with 276821, it forms a pair of twin primes.

276823 is a lucky number.

It is a nialpdrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 276791 and 276800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138411 + 138412.

It is an arithmetic number, because the mean of its divisors is an integer number (138412).

2²⁷⁶⁸²³ is an apocalyptic number.

276823 is a deficient number, since it is larger than the sum of its proper divisors (1).

276823 is an equidigital number, since it uses as much as digits as its factorization.

276823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 276823 is about 526.1397152848. The cubic root of 276823 is about 65.1729516319.

The spelling of 276823 in words is "two hundred seventy-six thousand, eight hundred twenty-three".