938131109 has 4 divisors (see below), whose sum is σ = 942577440. Its totient is φ = 933684780.

The previous prime is 938131091. The next prime is 938131151. The reversal of 938131109 is 901131839.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-938131109 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 (938131309) 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, 2222849 + ... + 2223270.

It is an arithmetic number, because the mean of its divisors is an integer number (235644360).

Almost surely, 2^938131109 is an apocalyptic number.

It is an amenable number.

938131109 is a deficient number, since it is larger than the sum of its proper divisors (4446331).

938131109 is a wasteful number, since it uses less digits than its factorization.

938131109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4446330.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 938131109 is about 30628.9260177369. The cubic root of 938131109 is about 978.9364795364.

The spelling of 938131109 in words is "nine hundred thirty-eight million, one hundred thirty-one thousand, one hundred nine".