8909473 has 2 divisors, whose sum is σ = 8909474. Its totient is φ = 8909472.

The previous prime is 8909449. The next prime is 8909491. The reversal of 8909473 is 3749098.

8909473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8020224 + 889249 = 2832^2 + 943^2 .

It is a cyclic number.

It is not a de Polignac number, because 8909473 - 2¹³ = 8901281 is a prime.

8909473 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8909573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4454736 + 4454737.

It is an arithmetic number, because the mean of its divisors is an integer number (4454737).

Almost surely, 2^8909473 is an apocalyptic number.

It is an amenable number.

8909473 is a deficient number, since it is larger than the sum of its proper divisors (1).

8909473 is an equidigital number, since it uses as much as digits as its factorization.

8909473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 8909473 is about 2984.8740341931. The cubic root of 8909473 is about 207.3086095099.

The spelling of 8909473 in words is "eight million, nine hundred nine thousand, four hundred seventy-three".