470721609 has 6 divisors (see below), whose sum is σ = 679931226. Its totient is φ = 313814400.

The previous prime is 470721571. The next prime is 470721613. The reversal of 470721609 is 906127074.

It is a happy number.

470721609 is a `hidden beast` number, since 47 + 0 + 7 + 2 + 1 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 389667600 + 81054009 = 19740^2 + 9003^2 .

It is not a de Polignac number, because 470721609 - 2⁷ = 470721481 is a prime.

It is a super-5 number, since 5×470721609⁵ (a number of 45 digits) contains 55555 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (470721679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26151192 + ... + 26151209.

It is an arithmetic number, because the mean of its divisors is an integer number (113321871).

Almost surely, 2^470721609 is an apocalyptic number.

It is an amenable number.

470721609 is a deficient number, since it is larger than the sum of its proper divisors (209209617).

470721609 is a wasteful number, since it uses less digits than its factorization.

470721609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52302407 (or 52302404 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 470721609 is about 21696.1196761080. The cubic root of 470721609 is about 777.8957137572.

The spelling of 470721609 in words is "four hundred seventy million, seven hundred twenty-one thousand, six hundred nine".