276132781 has 2 divisors, whose sum is σ = 276132782. Its totient is φ = 276132780.

The previous prime is 276132767. The next prime is 276132811. The reversal of 276132781 is 187231672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273604681 + 2528100 = 16541^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 276132781 - 2¹⁹ = 275608493 is a prime.

It is a super-2 number, since 2×276132781² = 152498625485587922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 276132781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276132721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138066390 + 138066391.

It is an arithmetic number, because the mean of its divisors is an integer number (138066391).

Almost surely, 2^276132781 is an apocalyptic number.

It is an amenable number.

276132781 is a deficient number, since it is larger than the sum of its proper divisors (1).

276132781 is an equidigital number, since it uses as much as digits as its factorization.

276132781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 37.

The square root of 276132781 is about 16617.2434838032. The cubic root of 276132781 is about 651.1874003807.

The spelling of 276132781 in words is "two hundred seventy-six million, one hundred thirty-two thousand, seven hundred eighty-one".