9139643381 has 8 divisors (see below), whose sum is σ = 9971404128. Its totient is φ = 8308030000.

The previous prime is 9139643369. The next prime is 9139643399. The reversal of 9139643381 is 1833469319.

9139643381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9139643381 - 2²² = 9135449077 is a prime.

It is a super-2 number, since 2×9139643381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9139643281) 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 7 ways as a sum of consecutive naturals, for example, 123026 + ... + 182796.

It is an arithmetic number, because the mean of its divisors is an integer number (1246425516).

Almost surely, 2^9139643381 is an apocalyptic number.

It is an amenable number.

9139643381 is a deficient number, since it is larger than the sum of its proper divisors (831760747).

9139643381 is a wasteful number, since it uses less digits than its factorization.

9139643381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73683.

The product of its digits is 419904, while the sum is 47.

The square root of 9139643381 is about 95601.4821067121. The cubic root of 9139643381 is about 2090.7868027301.

The spelling of 9139643381 in words is "nine billion, one hundred thirty-nine million, six hundred forty-three thousand, three hundred eighty-one".