816708243 has 16 divisors (see below), whose sum is σ = 1189230336. Its totient is φ = 495509280.

The previous prime is 816708229. The next prime is 816708247. The reversal of 816708243 is 342807618.

It is not a de Polignac number, because 816708243 - 2⁴ = 816708227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (816708247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144705 + ... + 150242.

It is an arithmetic number, because the mean of its divisors is an integer number (74326896).

Almost surely, 2^816708243 is an apocalyptic number.

816708243 is a deficient number, since it is larger than the sum of its proper divisors (372522093).

816708243 is a wasteful number, since it uses less digits than its factorization.

816708243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295034.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 816708243 is about 28578.1077575126. The cubic root of 816708243 is about 934.7360224024.

The spelling of 816708243 in words is "eight hundred sixteen million, seven hundred eight thousand, two hundred forty-three".