808620869 has 4 divisors (see below), whose sum is σ = 924138144. Its totient is φ = 693103596.

The previous prime is 808620823. The next prime is 808620877. The reversal of 808620869 is 968026808.

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 808620869 - 2²⁴ = 791843653 is a prime.

It is a super-2 number, since 2×808620869² = 1307735419564630322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808620899) 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, 57758627 + ... + 57758640.

It is an arithmetic number, because the mean of its divisors is an integer number (231034536).

Almost surely, 2^808620869 is an apocalyptic number.

It is an amenable number.

808620869 is a deficient number, since it is larger than the sum of its proper divisors (115517275).

808620869 is a wasteful number, since it uses less digits than its factorization.

808620869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115517274.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 808620869 is about 28436.2597575701. The cubic root of 808620869 is about 931.6404042479.

The spelling of 808620869 in words is "eight hundred eight million, six hundred twenty thousand, eight hundred sixty-nine".