475719721 has 9 divisors (see below), whose sum is σ = 505743511. Its totient is φ = 447387232.

The previous prime is 475719691. The next prime is 475719731. The reversal of 475719721 is 127917574.

The square root of 475719721 is 21811.

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., 370370025 + 105349696 = 19245^2 + 10264^2 .

It is not a de Polignac number, because 475719721 - 2¹¹ = 475717673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (475719731) 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, 370146 + ... + 371428.

Almost surely, 2^475719721 is an apocalyptic number.

475719721 is the 21811-st square number.

475719721 is the 10906-th centered octagonal number.

It is an amenable number.

475719721 is a deficient number, since it is larger than the sum of its proper divisors (30023790).

475719721 is an frugal number, since it uses more digits than its factorization.

475719721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600 (or 1300 counting only the distinct ones).

The product of its digits is 123480, while the sum is 43.

The cubic root of 475719721 is about 780.6392529646.

The spelling of 475719721 in words is "four hundred seventy-five million, seven hundred nineteen thousand, seven hundred twenty-one".