802636889 has 2 divisors, whose sum is σ = 802636890. Its totient is φ = 802636888.

The previous prime is 802636871. The next prime is 802636897. The reversal of 802636889 is 988636208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 797497600 + 5139289 = 28240^2 + 2267^2 .

It is a cyclic number.

It is not a de Polignac number, because 802636889 - 2⁸ = 802636633 is a prime.

It is not a weakly prime, because it can be changed into another prime (802636859) 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, 401318444 + 401318445.

It is an arithmetic number, because the mean of its divisors is an integer number (401318445).

Almost surely, 2^802636889 is an apocalyptic number.

It is an amenable number.

802636889 is a deficient number, since it is larger than the sum of its proper divisors (1).

802636889 is an equidigital number, since it uses as much as digits as its factorization.

802636889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 802636889 is about 28330.8469516885. The cubic root of 802636889 is about 929.3365943629.

The spelling of 802636889 in words is "eight hundred two million, six hundred thirty-six thousand, eight hundred eighty-nine".