9489638243 has 4 divisors (see below), whose sum is σ = 9498951960. Its totient is φ = 9480324528.

The previous prime is 9489638239. The next prime is 9489638251. The reversal of 9489638243 is 3428369849.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9489638243 - 2² = 9489638239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9489638143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4655330 + ... + 4657367.

It is an arithmetic number, because the mean of its divisors is an integer number (2374737990).

Almost surely, 2^9489638243 is an apocalyptic number.

9489638243 is a deficient number, since it is larger than the sum of its proper divisors (9313717).

9489638243 is a wasteful number, since it uses less digits than its factorization.

9489638243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9313716.

The product of its digits is 8957952, while the sum is 56.

The square root of 9489638243 is about 97414.7742542167. The cubic root of 9489638243 is about 2117.1415019228.

The spelling of 9489638243 in words is "nine billion, four hundred eighty-nine million, six hundred thirty-eight thousand, two hundred forty-three".