816451347 has 16 divisors (see below), whose sum is σ = 1106043392. Its totient is φ = 535597920.

The previous prime is 816451313. The next prime is 816451369. The reversal of 816451347 is 743154618.

It is not a de Polignac number, because 816451347 - 2⁶ = 816451283 is a prime.

It is a super-2 number, since 2×816451347² = 1333185604036228818, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816451387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265197 + ... + 268257.

It is an arithmetic number, because the mean of its divisors is an integer number (69127712).

Almost surely, 2^816451347 is an apocalyptic number.

816451347 is a deficient number, since it is larger than the sum of its proper divisors (289592045).

816451347 is a wasteful number, since it uses less digits than its factorization.

816451347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4458.

The product of its digits is 80640, while the sum is 39.

The square root of 816451347 is about 28573.6127747263. The cubic root of 816451347 is about 934.6380048916.

The spelling of 816451347 in words is "eight hundred sixteen million, four hundred fifty-one thousand, three hundred forty-seven".