808790869 has 2 divisors, whose sum is σ = 808790870. Its totient is φ = 808790868.

The previous prime is 808790867. The next prime is 808790893. The reversal of 808790869 is 968097808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 645922225 + 162868644 = 25415^2 + 12762^2 .

It is a cyclic number.

It is not a de Polignac number, because 808790869 - 2¹ = 808790867 is a prime.

It is a super-2 number, since 2×808790869² = 1308285339555550322, which contains 22 as substring.

Together with 808790867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (808790867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404395434 + 404395435.

It is an arithmetic number, because the mean of its divisors is an integer number (404395435).

Almost surely, 2^808790869 is an apocalyptic number.

It is an amenable number.

808790869 is a deficient number, since it is larger than the sum of its proper divisors (1).

808790869 is an equidigital number, since it uses as much as digits as its factorization.

808790869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The square root of 808790869 is about 28439.2487418356. The cubic root of 808790869 is about 931.7056873231.

The spelling of 808790869 in words is "eight hundred eight million, seven hundred ninety thousand, eight hundred sixty-nine".