816479 has 4 divisors (see below), whose sum is σ = 838584. Its totient is φ = 794376.

The previous prime is 816469. The next prime is 816499. The reversal of 816479 is 974618.

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 816479 - 2⁸ = 816223 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816469) 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 3 ways as a sum of consecutive naturals, for example, 10997 + ... + 11070.

It is an arithmetic number, because the mean of its divisors is an integer number (209646).

2⁸¹⁶⁴⁷⁹ is an apocalyptic number.

816479 is a deficient number, since it is larger than the sum of its proper divisors (22105).

816479 is a wasteful number, since it uses less digits than its factorization.

816479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22104.

The product of its digits is 12096, while the sum is 35.

The square root of 816479 is about 903.5922753101. The cubic root of 816479 is about 93.4648556756.

The spelling of 816479 in words is "eight hundred sixteen thousand, four hundred seventy-nine".