9839999389 has 12 divisors (see below), whose sum is σ = 10831389660. Its totient is φ = 8932616000.

The previous prime is 9839999363. The next prime is 9839999401.

It is a happy number.

9839999389 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 4424511289 + 5415488100 = 66517^2 + 73590^2 .

It is not a de Polignac number, because 9839999389 - 2¹³ = 9839991197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9839999329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26817 + ... + 142825.

It is an arithmetic number, because the mean of its divisors is an integer number (902615805).

Almost surely, 2^9839999389 is an apocalyptic number.

It is an amenable number.

9839999389 is a deficient number, since it is larger than the sum of its proper divisors (991390271).

9839999389 is a wasteful number, since it uses less digits than its factorization.

9839999389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116732 (or 116721 counting only the distinct ones).

The product of its digits is 306110016, while the sum is 76.

The square root of 9839999389 is about 99196.7710613607. The cubic root of 9839999389 is about 2142.8824950285.

The spelling of 9839999389 in words is "nine billion, eight hundred thirty-nine million, nine hundred ninety-nine thousand, three hundred eighty-nine".