470640217 has 8 divisors (see below), whose sum is σ = 491891400. Its totient is φ = 449723904.

The previous prime is 470640211. The next prime is 470640221. The reversal of 470640217 is 712046074.

It can be written as a sum of positive squares in 4 ways, for example, as 150087001 + 320553216 = 12251^2 + 17904^2 .

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 470640217 - 2¹¹ = 470638169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (470640211) 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, 80842 + ... + 86467.

It is an arithmetic number, because the mean of its divisors is an integer number (61486425).

Almost surely, 2^470640217 is an apocalyptic number.

It is an amenable number.

470640217 is a deficient number, since it is larger than the sum of its proper divisors (21251183).

470640217 is a wasteful number, since it uses less digits than its factorization.

470640217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167435.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 470640217 is about 21694.2438679019. The cubic root of 470640217 is about 777.8508761176.

The spelling of 470640217 in words is "four hundred seventy million, six hundred forty thousand, two hundred seventeen".