81300343 has 4 divisors (see below), whose sum is σ = 82213920. Its totient is φ = 80386768.

The previous prime is 81300337. The next prime is 81300347. The reversal of 81300343 is 34300318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81300343 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 (81300347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456655 + ... + 456832.

It is an arithmetic number, because the mean of its divisors is an integer number (20553480).

Almost surely, 2^81300343 is an apocalyptic number.

81300343 is a deficient number, since it is larger than the sum of its proper divisors (913577).

81300343 is an equidigital number, since it uses as much as digits as its factorization.

81300343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913576.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 81300343 is about 9016.6702834250. The cubic root of 81300343 is about 433.2089887147.

The spelling of 81300343 in words is "eighty-one million, three hundred thousand, three hundred forty-three".