816334403 has 4 divisors (see below), whose sum is σ = 835318968. Its totient is φ = 797349840.

The previous prime is 816334397. The next prime is 816334429. The reversal of 816334403 is 304433618.

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 816334403 - 2¹⁰ = 816333379 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 816334403.

It is not an unprimeable number, because it can be changed into a prime (816334483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9492218 + ... + 9492303.

It is an arithmetic number, because the mean of its divisors is an integer number (208829742).

Almost surely, 2^816334403 is an apocalyptic number.

816334403 is a deficient number, since it is larger than the sum of its proper divisors (18984565).

816334403 is a wasteful number, since it uses less digits than its factorization.

816334403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18984564.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 816334403 is about 28571.5663378821. The cubic root of 816334403 is about 934.5933786252.

The spelling of 816334403 in words is "eight hundred sixteen million, three hundred thirty-four thousand, four hundred three".