81076867 has 2 divisors, whose sum is σ = 81076868. Its totient is φ = 81076866.

The previous prime is 81076847. The next prime is 81076889. The reversal of 81076867 is 76867018.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81076867 is a prime.

It is not a weakly prime, because it can be changed into another prime (81076847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40538433 + 40538434.

It is an arithmetic number, because the mean of its divisors is an integer number (40538434).

Almost surely, 2^81076867 is an apocalyptic number.

81076867 is a deficient number, since it is larger than the sum of its proper divisors (1).

81076867 is an equidigital number, since it uses as much as digits as its factorization.

81076867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 81076867 is about 9004.2693762459. The cubic root of 81076867 is about 432.8116937440.

It can be divided in two parts, 810 and 76867, that added together give a palindrome (77677).

The spelling of 81076867 in words is "eighty-one million, seventy-six thousand, eight hundred sixty-seven".