817312603 has 2 divisors, whose sum is σ = 817312604. Its totient is φ = 817312602.

The previous prime is 817312583. The next prime is 817312609. The reversal of 817312603 is 306213718.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 817312603 - 2⁹ = 817312091 is a prime.

It is not a weakly prime, because it can be changed into another prime (817312609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408656301 + 408656302.

It is an arithmetic number, because the mean of its divisors is an integer number (408656302).

Almost surely, 2^817312603 is an apocalyptic number.

817312603 is a deficient number, since it is larger than the sum of its proper divisors (1).

817312603 is an equidigital number, since it uses as much as digits as its factorization.

817312603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 817312603 is about 28588.6796302313. The cubic root of 817312603 is about 934.9665322078.

The spelling of 817312603 in words is "eight hundred seventeen million, three hundred twelve thousand, six hundred three".