808888009 has 2 divisors, whose sum is σ = 808888010. Its totient is φ = 808888008.

The previous prime is 808887997. The next prime is 808888027. The reversal of 808888009 is 900888808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 475022025 + 333865984 = 21795^2 + 18272^2 .

It is a cyclic number.

It is not a de Polignac number, because 808888009 - 2¹³ = 808879817 is a prime.

It is a super-3 number, since 3×808888009³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (808888049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404444004 + 404444005.

It is an arithmetic number, because the mean of its divisors is an integer number (404444005).

Almost surely, 2^808888009 is an apocalyptic number.

It is an amenable number.

808888009 is a deficient number, since it is larger than the sum of its proper divisors (1).

808888009 is an equidigital number, since it uses as much as digits as its factorization.

808888009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294912, while the sum is 49.

The square root of 808888009 is about 28440.9565415793. The cubic root of 808888009 is about 931.7429867334.

The spelling of 808888009 in words is "eight hundred eight million, eight hundred eighty-eight thousand, nine".