9138808031 has 4 divisors (see below), whose sum is σ = 9676384992. Its totient is φ = 8601231072.

The previous prime is 9138808027. The next prime is 9138808033. The reversal of 9138808031 is 1308088319.

It is a happy number.

9138808031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9138808031 - 2² = 9138808027 is a prime.

It is a super-2 number, since 2×9138808031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9138808031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9138808033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268788455 + ... + 268788488.

It is an arithmetic number, because the mean of its divisors is an integer number (2419096248).

Almost surely, 2^9138808031 is an apocalyptic number.

9138808031 is a deficient number, since it is larger than the sum of its proper divisors (537576961).

9138808031 is a wasteful number, since it uses less digits than its factorization.

9138808031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537576960.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 9138808031 is about 95597.1130892560. The cubic root of 9138808031 is about 2090.7231025069.

The spelling of 9138808031 in words is "nine billion, one hundred thirty-eight million, eight hundred eight thousand, thirty-one".