813743 has 6 divisors (see below), whose sum is σ = 946656. Its totient is φ = 697452.

The previous prime is 813721. The next prime is 813749. The reversal of 813743 is 347318.

It is not a de Polignac number, because 813743 - 2¹⁴ = 797359 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 (813749) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8255 + ... + 8352.

It is an arithmetic number, because the mean of its divisors is an integer number (157776).

2⁸¹³⁷⁴³ is an apocalyptic number.

813743 is a deficient number, since it is larger than the sum of its proper divisors (132913).

813743 is a wasteful number, since it uses less digits than its factorization.

813743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16621 (or 16614 counting only the distinct ones).

The product of its digits is 2016, while the sum is 26.

The square root of 813743 is about 902.0770477071. The cubic root of 813743 is about 93.3603394072.

The spelling of 813743 in words is "eight hundred thirteen thousand, seven hundred forty-three".