817909016 has 16 divisors (see below), whose sum is σ = 1543737840. Its totient is φ = 406245600.

The previous prime is 817908997. The next prime is 817909019. The reversal of 817909016 is 610909718.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (817909019) 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, 337331 + ... + 339746.

It is an arithmetic number, because the mean of its divisors is an integer number (96483615).

Almost surely, 2^817909016 is an apocalyptic number.

It is an amenable number.

817909016 is a deficient number, since it is larger than the sum of its proper divisors (725828824).

817909016 is a wasteful number, since it uses less digits than its factorization.

817909016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677234 (or 677230 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 817909016 is about 28599.1086574390. The cubic root of 817909016 is about 935.1938995617.

It can be divided in two parts, 81 and 7909016, that added together give a palindrome (7909097).

The spelling of 817909016 in words is "eight hundred seventeen million, nine hundred nine thousand, sixteen".