816326543 has 4 divisors (see below), whose sum is σ = 816663408. Its totient is φ = 815989680.

The previous prime is 816326531. The next prime is 816326569. The reversal of 816326543 is 345623618.

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

It is a cyclic number.

It is not a de Polignac number, because 816326543 - 2¹² = 816322447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 816326497 and 816326506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816326573) 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, 164771 + ... + 169652.

It is an arithmetic number, because the mean of its divisors is an integer number (204165852).

Almost surely, 2^816326543 is an apocalyptic number.

816326543 is a deficient number, since it is larger than the sum of its proper divisors (336865).

816326543 is a wasteful number, since it uses less digits than its factorization.

816326543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336864.

The product of its digits is 103680, while the sum is 38.

The square root of 816326543 is about 28571.4287882143. The cubic root of 816326543 is about 934.5903790671.

The spelling of 816326543 in words is "eight hundred sixteen million, three hundred twenty-six thousand, five hundred forty-three".