81382327 has 4 divisors (see below), whose sum is σ = 87642520. Its totient is φ = 75122136.

The previous prime is 81382319. The next prime is 81382331. The reversal of 81382327 is 72328318.

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 81382327 - 2³ = 81382319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81382292 and 81382301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81382307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3130077 + ... + 3130102.

It is an arithmetic number, because the mean of its divisors is an integer number (21910630).

Almost surely, 2^81382327 is an apocalyptic number.

81382327 is a deficient number, since it is larger than the sum of its proper divisors (6260193).

81382327 is a wasteful number, since it uses less digits than its factorization.

81382327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6260192.

The product of its digits is 16128, while the sum is 34.

The square root of 81382327 is about 9021.2153837496. The cubic root of 81382327 is about 433.3545570801.

The spelling of 81382327 in words is "eighty-one million, three hundred eighty-two thousand, three hundred twenty-seven".