471717621 has 16 divisors (see below), whose sum is σ = 699865920. Its totient is φ = 314017200.

The previous prime is 471717619. The next prime is 471717637. The reversal of 471717621 is 126717174.

471717621 is a `hidden beast` number, since 4 + 7 + 17 + 17 + 621 = 666.

It is not a de Polignac number, because 471717621 - 2¹ = 471717619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (471717601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6466 + ... + 31388.

It is an arithmetic number, because the mean of its divisors is an integer number (43741620).

Almost surely, 2^471717621 is an apocalyptic number.

It is an amenable number.

471717621 is a deficient number, since it is larger than the sum of its proper divisors (228148299).

471717621 is a wasteful number, since it uses less digits than its factorization.

471717621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25633 (or 25627 counting only the distinct ones).

The product of its digits is 16464, while the sum is 36.

The square root of 471717621 is about 21719.0612366189. The cubic root of 471717621 is about 778.4439837777.

The spelling of 471717621 in words is "four hundred seventy-one million, seven hundred seventeen thousand, six hundred twenty-one".