276742481 has 2 divisors, whose sum is σ = 276742482. Its totient is φ = 276742480.

The previous prime is 276742409. The next prime is 276742511. The reversal of 276742481 is 184247672.

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., 275858881 + 883600 = 16609^2 + 940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-276742481 is a prime.

It is a super-2 number, since 2×276742481² = 153172801580070722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (276742681) 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, 138371240 + 138371241.

It is an arithmetic number, because the mean of its divisors is an integer number (138371241).

Almost surely, 2^276742481 is an apocalyptic number.

It is an amenable number.

276742481 is a deficient number, since it is larger than the sum of its proper divisors (1).

276742481 is an equidigital number, since it uses as much as digits as its factorization.

276742481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 41.

The square root of 276742481 is about 16635.5787696130. The cubic root of 276742481 is about 651.6663210673. Note that the first 3 decimals are identical.

The spelling of 276742481 in words is "two hundred seventy-six million, seven hundred forty-two thousand, four hundred eighty-one".