470000721 has 8 divisors (see below), whose sum is σ = 627426880. Its totient is φ = 312954192.

The previous prime is 470000693. The next prime is 470000803. The reversal of 470000721 is 127000074.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 470000721 - 2⁵ = 470000689 is a prime.

It is the 21680-th Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (470000221) by changing a digit.

It is a nontrivial repunit in base 21679.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92005 + ... + 96978.

It is an arithmetic number, because the mean of its divisors is an integer number (78428360).

Almost surely, 2^470000721 is an apocalyptic number.

It is an amenable number.

470000721 is a deficient number, since it is larger than the sum of its proper divisors (157426159).

470000721 is a wasteful number, since it uses less digits than its factorization.

470000721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189815.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 470000721 is about 21679.5000172974. The cubic root of 470000721 is about 777.4984073057.

Adding to 470000721 its reverse (127000074), we get a palindrome (597000795).

The spelling of 470000721 in words is "four hundred seventy million, seven hundred twenty-one", and thus it is an aban number.