818138303 has 2 divisors, whose sum is σ = 818138304. Its totient is φ = 818138302.

The previous prime is 818138291. The next prime is 818138317. The reversal of 818138303 is 303831818.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 818138303 - 2⁴ = 818138287 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (818138003) 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, 409069151 + 409069152.

It is an arithmetic number, because the mean of its divisors is an integer number (409069152).

Almost surely, 2^818138303 is an apocalyptic number.

818138303 is a deficient number, since it is larger than the sum of its proper divisors (1).

818138303 is an equidigital number, since it uses as much as digits as its factorization.

818138303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 818138303 is about 28603.1170154583. The cubic root of 818138303 is about 935.2812800101.

The spelling of 818138303 in words is "eight hundred eighteen million, one hundred thirty-eight thousand, three hundred three".