820168471 has 8 divisors (see below), whose sum is σ = 842961600. Its totient is φ = 797598048.

The previous prime is 820168463. The next prime is 820168543. The reversal of 820168471 is 174861028.

820168471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 820168471 - 2³ = 820168463 is a prime.

It is a super-3 number, since 3×820168471³ (a number of 28 digits) contains 333 as substring.

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 820168471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820168411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48196 + ... + 62953.

It is an arithmetic number, because the mean of its divisors is an integer number (105370200).

Almost surely, 2^820168471 is an apocalyptic number.

820168471 is a deficient number, since it is larger than the sum of its proper divisors (22793129).

820168471 is a wasteful number, since it uses less digits than its factorization.

820168471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111353.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 820168471 is about 28638.5836067359. The cubic root of 820168471 is about 936.0542584120.

The spelling of 820168471 in words is "eight hundred twenty million, one hundred sixty-eight thousand, four hundred seventy-one".