816722469 has 12 divisors (see below), whose sum is σ = 1182343500. Its totient is φ = 543266304.

The previous prime is 816722453. The next prime is 816722477. The reversal of 816722469 is 964227618.

It is a happy number.

816722469 is a `hidden beast` number, since 8 + 167 + 22 + 469 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 486864225 + 329858244 = 22065^2 + 18162^2 .

It is not a de Polignac number, because 816722469 - 2⁴ = 816722453 is a prime.

It is a super-2 number, since 2×816722469² = 1334071182738911922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816720469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97014 + ... + 105095.

It is an arithmetic number, because the mean of its divisors is an integer number (98528625).

Almost surely, 2^816722469 is an apocalyptic number.

It is an amenable number.

816722469 is a deficient number, since it is larger than the sum of its proper divisors (365621031).

816722469 is a wasteful number, since it uses less digits than its factorization.

816722469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202564 (or 202561 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 816722469 is about 28578.3566532437. The cubic root of 816722469 is about 934.7414496679.

The spelling of 816722469 in words is "eight hundred sixteen million, seven hundred twenty-two thousand, four hundred sixty-nine".