76685281 has 2 divisors, whose sum is σ = 76685282. Its totient is φ = 76685280.

The previous prime is 76685263. The next prime is 76685321. The reversal of 76685281 is 18258667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43230625 + 33454656 = 6575^2 + 5784^2 .

It is a cyclic number.

It is not a de Polignac number, because 76685281 - 2¹⁹ = 76160993 is a prime.

It is a super-2 number, since 2×76685281² = 11761264644097922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (76685261) 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, 38342640 + 38342641.

It is an arithmetic number, because the mean of its divisors is an integer number (38342641).

Almost surely, 2^76685281 is an apocalyptic number.

It is an amenable number.

76685281 is a deficient number, since it is larger than the sum of its proper divisors (1).

76685281 is an equidigital number, since it uses as much as digits as its factorization.

76685281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 76685281 is about 8757.0132465356. The cubic root of 76685281 is about 424.8516778851.

The spelling of 76685281 in words is "seventy-six million, six hundred eighty-five thousand, two hundred eighty-one".