816368503 has 2 divisors, whose sum is σ = 816368504. Its totient is φ = 816368502.

The previous prime is 816368453. The next prime is 816368519. The reversal of 816368503 is 305863618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 816368503 - 2⁹ = 816367991 is a prime.

It is a super-2 number, since 2×816368503² = 1332915065380922018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816368533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408184251 + 408184252.

It is an arithmetic number, because the mean of its divisors is an integer number (408184252).

Almost surely, 2^816368503 is an apocalyptic number.

816368503 is a deficient number, since it is larger than the sum of its proper divisors (1).

816368503 is an equidigital number, since it uses as much as digits as its factorization.

816368503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 816368503 is about 28572.1630787730. The cubic root of 816368503 is about 934.6063917525.

The spelling of 816368503 in words is "eight hundred sixteen million, three hundred sixty-eight thousand, five hundred three".