81069233 has 8 divisors (see below), whose sum is σ = 94805568. Its totient is φ = 67871664.

The previous prime is 81069223. The next prime is 81069253. The reversal of 81069233 is 33296018.

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

It is not a de Polignac number, because 81069233 - 2⁶ = 81069169 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 81069233.

It is not an unprimeable number, because it can be changed into a prime (81069203) 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, 134366 + ... + 134967.

It is an arithmetic number, because the mean of its divisors is an integer number (11850696).

Almost surely, 2^81069233 is an apocalyptic number.

It is an amenable number.

81069233 is a deficient number, since it is larger than the sum of its proper divisors (13736335).

81069233 is a wasteful number, since it uses less digits than its factorization.

81069233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269383.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 81069233 is about 9003.8454562481. The cubic root of 81069233 is about 432.7981091532.

The spelling of 81069233 in words is "eighty-one million, sixty-nine thousand, two hundred thirty-three".