81347327 has 8 divisors (see below), whose sum is σ = 83543040. Its totient is φ = 79180920.

The previous prime is 81347323. The next prime is 81347339. The reversal of 81347327 is 72374318.

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 81347327 - 2² = 81347323 is a prime.

It is a super-2 number, since 2×81347327² = 13234775220089858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81347323) 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, 1643 + ... + 12860.

It is an arithmetic number, because the mean of its divisors is an integer number (10442880).

Almost surely, 2^81347327 is an apocalyptic number.

81347327 is a deficient number, since it is larger than the sum of its proper divisors (2195713).

81347327 is a wasteful number, since it uses less digits than its factorization.

81347327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14653.

The product of its digits is 28224, while the sum is 35.

The square root of 81347327 is about 9019.2753034820. The cubic root of 81347327 is about 433.2924240802.

The spelling of 81347327 in words is "eighty-one million, three hundred forty-seven thousand, three hundred twenty-seven".