471747811921 has 9 divisors (see below), whose sum is σ = 483004066779. Its totient is φ = 460748085336.

The previous prime is 471747811919. The next prime is 471747811987. The reversal of 471747811921 is 129118747174.

The square root of 471747811921 is 686839.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 351868444225 + 119879367696 = 593185^2 + 346236^2 .

It is not a de Polignac number, because 471747811921 - 2¹ = 471747811919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (471747811991) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 29526091 + ... + 29542063.

It is an arithmetic number, because the mean of its divisors is an integer number (53667118531).

Almost surely, 2^471747811921 is an apocalyptic number.

471747811921 is the 686839-th square number.

471747811921 is the 343420-th centered octagonal number.

It is an amenable number.

471747811921 is a deficient number, since it is larger than the sum of its proper divisors (11256254858).

471747811921 is an frugal number, since it uses more digits than its factorization.

471747811921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32032 (or 16016 counting only the distinct ones).

The product of its digits is 790272, while the sum is 52.

The spelling of 471747811921 in words is "four hundred seventy-one billion, seven hundred forty-seven million, eight hundred eleven thousand, nine hundred twenty-one".