816243169 has 8 divisors (see below), whose sum is σ = 933266880. Its totient is φ = 699323856.

The previous prime is 816243143. The next prime is 816243191. The reversal of 816243169 is 961342618.

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

It is not a de Polignac number, because 816243169 - 2⁵ = 816243137 is a prime.

It is a super-2 number, since 2×816243169² = 1332505821878325122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (816243139) 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, 8554 + ... + 41299.

It is an arithmetic number, because the mean of its divisors is an integer number (116658360).

Almost surely, 2^816243169 is an apocalyptic number.

It is an amenable number.

816243169 is a deficient number, since it is larger than the sum of its proper divisors (117023711).

816243169 is a wasteful number, since it uses less digits than its factorization.

816243169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52199.

The product of its digits is 62208, while the sum is 40.

The square root of 816243169 is about 28569.9697059692. The cubic root of 816243169 is about 934.5585604312.

The spelling of 816243169 in words is "eight hundred sixteen million, two hundred forty-three thousand, one hundred sixty-nine".