276380261 has 2 divisors, whose sum is σ = 276380262. Its totient is φ = 276380260.

The previous prime is 276380243. The next prime is 276380267. The reversal of 276380261 is 162083672.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165920161 + 110460100 = 12881^2 + 10510^2 .

It is a cyclic number.

It is not a de Polignac number, because 276380261 - 2⁶ = 276380197 is a prime.

It is a super-3 number, since 3×276380261³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276380267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138190130 + 138190131.

It is an arithmetic number, because the mean of its divisors is an integer number (138190131).

Almost surely, 2^276380261 is an apocalyptic number.

It is an amenable number.

276380261 is a deficient number, since it is larger than the sum of its proper divisors (1).

276380261 is an equidigital number, since it uses as much as digits as its factorization.

276380261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 276380261 is about 16624.6882978298. The cubic root of 276380261 is about 651.3818813796.

The spelling of 276380261 in words is "two hundred seventy-six million, three hundred eighty thousand, two hundred sixty-one".