9444537139 has 4 divisors (see below), whose sum is σ = 9471599200. Its totient is φ = 9417475080.

The previous prime is 9444537107. The next prime is 9444537149. The reversal of 9444537139 is 9317354449.

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 9444537139 - 2⁵ = 9444537107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9444537092 and 9444537101.

It is not an unprimeable number, because it can be changed into a prime (9444537149) 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, 13530507 + ... + 13531204.

It is an arithmetic number, because the mean of its divisors is an integer number (2367899800).

Almost surely, 2^9444537139 is an apocalyptic number.

9444537139 is a deficient number, since it is larger than the sum of its proper divisors (27062061).

9444537139 is a wasteful number, since it uses less digits than its factorization.

9444537139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27062060.

The product of its digits is 1632960, while the sum is 49.

The square root of 9444537139 is about 97183.0084891387. The cubic root of 9444537139 is about 2113.7821504747.

The spelling of 9444537139 in words is "nine billion, four hundred forty-four million, five hundred thirty-seven thousand, one hundred thirty-nine".