818489801 has 2 divisors, whose sum is σ = 818489802. Its totient is φ = 818489800.

The previous prime is 818489779. The next prime is 818489857. The reversal of 818489801 is 108984818.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 583174201 + 235315600 = 24149^2 + 15340^2 .

It is a cyclic number.

It is not a de Polignac number, because 818489801 - 2²² = 814295497 is a prime.

It is not a weakly prime, because it can be changed into another prime (818459801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409244900 + 409244901.

It is an arithmetic number, because the mean of its divisors is an integer number (409244901).

Almost surely, 2^818489801 is an apocalyptic number.

It is an amenable number.

818489801 is a deficient number, since it is larger than the sum of its proper divisors (1).

818489801 is an equidigital number, since it uses as much as digits as its factorization.

818489801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 47.

The square root of 818489801 is about 28609.2607559161. The cubic root of 818489801 is about 935.4152029377.

The spelling of 818489801 in words is "eight hundred eighteen million, four hundred eighty-nine thousand, eight hundred one".