9840040039 has 4 divisors (see below), whose sum is σ = 9937466280. Its totient is φ = 9742613800.

The previous prime is 9840040033. The next prime is 9840040099. The reversal of 9840040039 is 9300400489.

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

It is a cyclic number.

It is not a de Polignac number, because 9840040039 - 2³ = 9840040031 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 (9840040031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48712969 + ... + 48713170.

It is an arithmetic number, because the mean of its divisors is an integer number (2484366570).

Almost surely, 2^9840040039 is an apocalyptic number.

9840040039 is a deficient number, since it is larger than the sum of its proper divisors (97426241).

9840040039 is a wasteful number, since it uses less digits than its factorization.

9840040039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97426240.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 9840040039 is about 99196.9759569313. The cubic root of 9840040039 is about 2142.8854458435.

It can be divided in two parts, 9 and 840040039, that added together give a palindrome (840040048).

The spelling of 9840040039 in words is "nine billion, eight hundred forty million, forty thousand, thirty-nine".