81107323 has 8 divisors (see below), whose sum is σ = 93685680. Its totient is φ = 69396480.

The previous prime is 81107321. The next prime is 81107339. The reversal of 81107323 is 32370118.

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 81107323 - 2¹ = 81107321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81107321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216678 + ... + 217051.

It is an arithmetic number, because the mean of its divisors is an integer number (11710710).

Almost surely, 2^81107323 is an apocalyptic number.

81107323 is a deficient number, since it is larger than the sum of its proper divisors (12578357).

81107323 is a wasteful number, since it uses less digits than its factorization.

81107323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433757.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 81107323 is about 9005.9604151917. The cubic root of 81107323 is about 432.8658812627.

The spelling of 81107323 in words is "eighty-one million, one hundred seven thousand, three hundred twenty-three".