816338903 has 4 divisors (see below), whose sum is σ = 842672448. Its totient is φ = 790005360.

The previous prime is 816338899. The next prime is 816338909. The reversal of 816338903 is 309833618.

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 816338903 - 2² = 816338899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816338909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13166726 + ... + 13166787.

It is an arithmetic number, because the mean of its divisors is an integer number (210668112).

Almost surely, 2^816338903 is an apocalyptic number.

816338903 is a deficient number, since it is larger than the sum of its proper divisors (26333545).

816338903 is a wasteful number, since it uses less digits than its factorization.

816338903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26333544.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 816338903 is about 28571.6450873939. The cubic root of 816338903 is about 934.5950959208.

The spelling of 816338903 in words is "eight hundred sixteen million, three hundred thirty-eight thousand, nine hundred three".