470910821 has 2 divisors, whose sum is σ = 470910822. Its totient is φ = 470910820.

The previous prime is 470910779. The next prime is 470910823. The reversal of 470910821 is 128019074.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258888100 + 212022721 = 16090^2 + 14561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-470910821 is a prime.

It is a super-3 number, since 3×470910821³ (a number of 27 digits) contains 333 as substring.

Together with 470910823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (470910823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235455410 + 235455411.

It is an arithmetic number, because the mean of its divisors is an integer number (235455411).

Almost surely, 2^470910821 is an apocalyptic number.

It is an amenable number.

470910821 is a deficient number, since it is larger than the sum of its proper divisors (1).

470910821 is an equidigital number, since it uses as much as digits as its factorization.

470910821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 470910821 is about 21700.4797412407. The cubic root of 470910821 is about 777.9999278575. Note that the first 4 decimals are identical.

Adding to 470910821 its reverse (128019074), we get a palindrome (598929895).

The spelling of 470910821 in words is "four hundred seventy million, nine hundred ten thousand, eight hundred twenty-one".