808609993 has 4 divisors (see below), whose sum is σ = 808956288. Its totient is φ = 808263700.

The previous prime is 808609933. The next prime is 808610027. The reversal of 808609993 is 399906808.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 808609993 - 2¹⁷ = 808478921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 808609993.

It is not an unprimeable number, because it can be changed into a prime (808609933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169621 + ... + 174322.

It is an arithmetic number, because the mean of its divisors is an integer number (202239072).

Almost surely, 2^808609993 is an apocalyptic number.

It is an amenable number.

808609993 is a deficient number, since it is larger than the sum of its proper divisors (346295).

808609993 is a wasteful number, since it uses less digits than its factorization.

808609993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346294.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 808609993 is about 28436.0685222131. The cubic root of 808609993 is about 931.6362273557.

The spelling of 808609993 in words is "eight hundred eight million, six hundred nine thousand, nine hundred ninety-three".