81367 has 8 divisors (see below), whose sum is σ = 95760. Its totient is φ = 68160.

The previous prime is 81359. The next prime is 81371. The reversal of 81367 is 76318.

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 81367 - 2³ = 81359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81307) 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, 142 + ... + 427.

It is an arithmetic number, because the mean of its divisors is an integer number (11970).

2⁸¹³⁶⁷ is an apocalyptic number.

81367 is the 143-rd decagonal number.

81367 is a deficient number, since it is larger than the sum of its proper divisors (14393).

81367 is a wasteful number, since it uses less digits than its factorization.

81367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593.

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

The square root of 81367 is about 285.2490140211. The cubic root of 81367 is about 43.3327350345.

The spelling of 81367 in words is "eighty-one thousand, three hundred sixty-seven".