818897903 has 2 divisors, whose sum is σ = 818897904. Its totient is φ = 818897902.

The previous prime is 818897851. The next prime is 818897917. The reversal of 818897903 is 309798818.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 818897903 - 2¹⁶ = 818832367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (818897503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409448951 + 409448952.

It is an arithmetic number, because the mean of its divisors is an integer number (409448952).

Almost surely, 2^818897903 is an apocalyptic number.

818897903 is a deficient number, since it is larger than the sum of its proper divisors (1).

818897903 is an equidigital number, since it uses as much as digits as its factorization.

818897903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 53.

The square root of 818897903 is about 28616.3922079636. The cubic root of 818897903 is about 935.5706442500.

The spelling of 818897903 in words is "eight hundred eighteen million, eight hundred ninety-seven thousand, nine hundred three".