9938133187 has 4 divisors (see below), whose sum is σ = 9939080736. Its totient is φ = 9937185640.

The previous prime is 9938133169. The next prime is 9938133209. The reversal of 9938133187 is 7813318399.

It is a happy number.

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 9938133187 - 2⁷ = 9938133059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9938133167) 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, 457864 + ... + 479077.

It is an arithmetic number, because the mean of its divisors is an integer number (2484770184).

Almost surely, 2^9938133187 is an apocalyptic number.

9938133187 is a deficient number, since it is larger than the sum of its proper divisors (947549).

9938133187 is a wasteful number, since it uses less digits than its factorization.

9938133187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947548.

The product of its digits is 979776, while the sum is 52.

The square root of 9938133187 is about 99690.1860114625. The cubic root of 9938133187 is about 2149.9825624690.

The spelling of 9938133187 in words is "nine billion, nine hundred thirty-eight million, one hundred thirty-three thousand, one hundred eighty-seven".