81343023 has 8 divisors (see below), whose sum is σ = 108528000. Its totient is φ = 54193368.

The previous prime is 81343021. The next prime is 81343033. The reversal of 81343023 is 32034318.

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

It is not a de Polignac number, because 81343023 - 2¹ = 81343021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81342984 and 81343002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81343021) 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, 2883 + ... + 13076.

It is an arithmetic number, because the mean of its divisors is an integer number (13566000).

Almost surely, 2^81343023 is an apocalyptic number.

81343023 is a deficient number, since it is larger than the sum of its proper divisors (27184977).

81343023 is a wasteful number, since it uses less digits than its factorization.

81343023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17661.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 81343023 is about 9019.0367002247. The cubic root of 81343023 is about 433.2847822660.

The spelling of 81343023 in words is "eighty-one million, three hundred forty-three thousand, twenty-three".