81068335 has 4 divisors (see below), whose sum is σ = 97282008. Its totient is φ = 64854664.

The previous prime is 81068333. The next prime is 81068381. The reversal of 81068335 is 53386018.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81068335 - 2¹ = 81068333 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81068335.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81068333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8106829 + ... + 8106838.

It is an arithmetic number, because the mean of its divisors is an integer number (24320502).

Almost surely, 2^81068335 is an apocalyptic number.

81068335 is a deficient number, since it is larger than the sum of its proper divisors (16213673).

81068335 is a wasteful number, since it uses less digits than its factorization.

81068335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16213672.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 81068335 is about 9003.7955885282. The cubic root of 81068335 is about 432.7965111194.

The spelling of 81068335 in words is "eighty-one million, sixty-eight thousand, three hundred thirty-five".