9489949172 has 18 divisors (see below), whose sum is σ = 18254427954. Its totient is φ = 4313613040.

The previous prime is 9489949127. The next prime is 9489949177. The reversal of 9489949172 is 2719499849.

It can be written as a sum of positive squares in only one way, i.e., 6922905616 + 2567043556 = 83204^2 + 50666^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9489949177) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9803183 + ... + 9804150.

Almost surely, 2^9489949172 is an apocalyptic number.

It is an amenable number.

9489949172 is a deficient number, since it is larger than the sum of its proper divisors (8764478782).

9489949172 is a wasteful number, since it uses less digits than its factorization.

9489949172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19607359 (or 19607346 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 62.

The square root of 9489949172 is about 97416.3701438316. The cubic root of 9489949172 is about 2117.1646244586.

The spelling of 9489949172 in words is "nine billion, four hundred eighty-nine million, nine hundred forty-nine thousand, one hundred seventy-two".