276489481 has 2 divisors, whose sum is σ = 276489482. Its totient is φ = 276489480.

The previous prime is 276489469. The next prime is 276489491. The reversal of 276489481 is 184984672.

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., 272250000 + 4239481 = 16500^2 + 2059^2 .

It is a cyclic number.

It is not a de Polignac number, because 276489481 - 2¹¹ = 276487433 is a prime.

It is a super-2 number, since 2×276489481² = 152892866207298722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (276489401) 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 as a sum of consecutive naturals, namely, 138244740 + 138244741.

It is an arithmetic number, because the mean of its divisors is an integer number (138244741).

Almost surely, 2^276489481 is an apocalyptic number.

It is an amenable number.

276489481 is a deficient number, since it is larger than the sum of its proper divisors (1).

276489481 is an equidigital number, since it uses as much as digits as its factorization.

276489481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 49.

The square root of 276489481 is about 16627.9728469829. The cubic root of 276489481 is about 651.4676744814.

The spelling of 276489481 in words is "two hundred seventy-six million, four hundred eighty-nine thousand, four hundred eighty-one".