9448423209 has 9 divisors (see below), whose sum is σ = 13648143639. Its totient is φ = 6298754400.

The previous prime is 9448423181. The next prime is 9448423249. The reversal of 9448423209 is 9023248449.

It is a happy number.

The square root of 9448423209 is 97203.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9447256809 + 1166400 = 97197^2 + 1080^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 9448423209 - 2¹¹ = 9448421161 is a prime.

It is a super-2 number, since 2×9448423209² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9448423249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 275409 + ... + 307809.

Almost surely, 2^9448423209 is an apocalyptic number.

9448423209 is the 97203-rd square number.

9448423209 is the 48602-nd centered octagonal number.

It is an amenable number.

9448423209 is a deficient number, since it is larger than the sum of its proper divisors (4199720430).

9448423209 is an frugal number, since it uses more digits than its factorization.

9448423209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64808 (or 32404 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The cubic root of 9448423209 is about 2114.0720245368.

The spelling of 9448423209 in words is "nine billion, four hundred forty-eight million, four hundred twenty-three thousand, two hundred nine".