808779965 has 16 divisors (see below), whose sum is σ = 1127986560. Its totient is φ = 545190720.

The previous prime is 808779953. The next prime is 808779997. The reversal of 808779965 is 569977808.

808779965 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 808779965 - 2⁴ = 808779949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193766 + ... + 197895.

It is an arithmetic number, because the mean of its divisors is an integer number (70499160).

Almost surely, 2^808779965 is an apocalyptic number.

It is an amenable number.

808779965 is a deficient number, since it is larger than the sum of its proper divisors (319206595).

808779965 is a wasteful number, since it uses less digits than its factorization.

808779965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391732.

The product of its (nonzero) digits is 7620480, while the sum is 59.

The square root of 808779965 is about 28439.0570342970. The cubic root of 808779965 is about 931.7015002645.

The spelling of 808779965 in words is "eight hundred eight million, seven hundred seventy-nine thousand, nine hundred sixty-five".