9729431149 has 4 divisors (see below), whose sum is σ = 9730960380. Its totient is φ = 9727901920.

The previous prime is 9729431147. The next prime is 9729431209. The reversal of 9729431149 is 9411349279.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1947015625 + 7782415524 = 44125^2 + 88218^2 .

It is a cyclic number.

It is not a de Polignac number, because 9729431149 - 2¹ = 9729431147 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9729431147) 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 3 ways as a sum of consecutive naturals, for example, 755032 + ... + 767809.

It is an arithmetic number, because the mean of its divisors is an integer number (2432740095).

Almost surely, 2^9729431149 is an apocalyptic number.

It is an amenable number.

9729431149 is a deficient number, since it is larger than the sum of its proper divisors (1529231).

9729431149 is a wasteful number, since it uses less digits than its factorization.

9729431149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529230.

The product of its digits is 489888, while the sum is 49.

The square root of 9729431149 is about 98637.8788752070. The cubic root of 9729431149 is about 2134.8259980645.

The spelling of 9729431149 in words is "nine billion, seven hundred twenty-nine million, four hundred thirty-one thousand, one hundred forty-nine".