276981 has 8 divisors (see below), whose sum is σ = 391104. Its totient is φ = 173760.

The previous prime is 276977. The next prime is 277003. The reversal of 276981 is 189672.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 276981 - 2² = 276977 is a prime.

It is a super-2 number, since 2×276981² = 153436948722, which contains 22 as substring.

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

It is a Curzon number.

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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2665 + ... + 2766.

It is an arithmetic number, because the mean of its divisors is an integer number (48888).

2²⁷⁶⁹⁸¹ is an apocalyptic number.

It is an amenable number.

276981 is a deficient number, since it is larger than the sum of its proper divisors (114123).

276981 is a wasteful number, since it uses less digits than its factorization.

276981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5451.

The product of its digits is 6048, while the sum is 33.

The square root of 276981 is about 526.2898440973. The cubic root of 276981 is about 65.1853486845.

It can be divided in two parts, 2769 and 81, that added together give a triangular number (2850 = T₇₅).

The spelling of 276981 in words is "two hundred seventy-six thousand, nine hundred eighty-one".