276991 has 12 divisors (see below), whose sum is σ = 329400. Its totient is φ = 230880.

The previous prime is 276977. The next prime is 277003. The reversal of 276991 is 199672.

It is not a de Polignac number, because 276991 - 2¹¹ = 274943 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276901) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1785 + ... + 1933.

It is an arithmetic number, because the mean of its divisors is an integer number (27450).

2²⁷⁶⁹⁹¹ is an apocalyptic number.

276991 is a deficient number, since it is larger than the sum of its proper divisors (52409).

276991 is a wasteful number, since it uses less digits than its factorization.

276991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 173 counting only the distinct ones).

The product of its digits is 6804, while the sum is 34.

The square root of 276991 is about 526.2993444799. The cubic root of 276991 is about 65.1861331494.

The spelling of 276991 in words is "two hundred seventy-six thousand, nine hundred ninety-one".