470973221 has 2 divisors, whose sum is σ = 470973222. Its totient is φ = 470973220.

The previous prime is 470973203. The next prime is 470973227. The reversal of 470973221 is 122379074.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424936996 + 46036225 = 20614^2 + 6785^2 .

It is a cyclic number.

It is not a de Polignac number, because 470973221 - 2⁶ = 470973157 is a prime.

It is a super-2 number, since 2×470973221² = 443631549798229682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (470973227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235486610 + 235486611.

It is an arithmetic number, because the mean of its divisors is an integer number (235486611).

Almost surely, 2^470973221 is an apocalyptic number.

It is an amenable number.

470973221 is a deficient number, since it is larger than the sum of its proper divisors (1).

470973221 is an equidigital number, since it uses as much as digits as its factorization.

470973221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 470973221 is about 21701.9174498476. The cubic root of 470973221 is about 778.0342903803.

The spelling of 470973221 in words is "four hundred seventy million, nine hundred seventy-three thousand, two hundred twenty-one".