9539406789 has 16 divisors (see below), whose sum is σ = 13890354240. Its totient is φ = 5775269760.

The previous prime is 9539406763. The next prime is 9539406829. The reversal of 9539406789 is 9876049359.

It is not a de Polignac number, because 9539406789 - 2¹¹ = 9539404741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9539406719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123334 + ... + 185175.

It is an arithmetic number, because the mean of its divisors is an integer number (868147140).

Almost surely, 2^9539406789 is an apocalyptic number.

It is an amenable number.

9539406789 is a deficient number, since it is larger than the sum of its proper divisors (4350947451).

9539406789 is a wasteful number, since it uses less digits than its factorization.

9539406789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309460.

The product of its (nonzero) digits is 14696640, while the sum is 60.

The square root of 9539406789 is about 97669.8868075519. The cubic root of 9539406789 is about 2120.8361769873.

It can be divided in two parts, 9539 and 406789, that added together give a triangular number (416328 = T₉₁₂).

The spelling of 9539406789 in words is "nine billion, five hundred thirty-nine million, four hundred six thousand, seven hundred eighty-nine".