9789717249 has 81 divisors (see below), whose sum is σ = 15946705827. Its totient is φ = 5784603552.

The previous prime is 9789717227. The next prime is 9789717271. The reversal of 9789717249 is 9427179879.

The square root of 9789717249 is 98943.

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

It is an interprime number because it is at equal distance from previous prime (9789717227) and next prime (9789717271).

It can be written as a sum of positive squares in only one way, i.e., 1448183025 + 8341534224 = 38055^2 + 91332^2 .

It is not a de Polignac number, because 9789717249 - 2²¹ = 9787620097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9789717299) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 165927382 + ... + 165927440.

Almost surely, 2^9789717249 is an apocalyptic number.

9789717249 is the 98943-rd square number.

9789717249 is the 49472-nd centered octagonal number.

It is an amenable number.

9789717249 is a deficient number, since it is larger than the sum of its proper divisors (6156988578).

9789717249 is a wasteful number, since it uses less digits than its factorization.

9789717249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 118 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 63.

The cubic root of 9789717249 is about 2139.2262356055.

The spelling of 9789717249 in words is "nine billion, seven hundred eighty-nine million, seven hundred seventeen thousand, two hundred forty-nine".