81068867 has 8 divisors (see below), whose sum is σ = 88600512. Its totient is φ = 73564200.

The previous prime is 81068863. The next prime is 81068879. The reversal of 81068867 is 76886018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81068867 - 2² = 81068863 is a prime.

It is a super-2 number, since 2×81068867² = 13144322393327378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81068863) 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 in 7 ways as a sum of consecutive naturals, for example, 173 + ... + 12734.

It is an arithmetic number, because the mean of its divisors is an integer number (11075064).

Almost surely, 2^81068867 is an apocalyptic number.

81068867 is a deficient number, since it is larger than the sum of its proper divisors (7531645).

81068867 is a wasteful number, since it uses less digits than its factorization.

81068867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13489.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 81068867 is about 9003.8251315760. The cubic root of 81068867 is about 432.7974578402.

The spelling of 81068867 in words is "eighty-one million, sixty-eight thousand, eight hundred sixty-seven".