9138508138 has 4 divisors (see below), whose sum is σ = 13707762210. Its totient is φ = 4569254068.

The previous prime is 9138508129. The next prime is 9138508153. The reversal of 9138508138 is 8318058319.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8318058319 = 37 ⋅224812387.

It can be written as a sum of positive squares in only one way, i.e., 8952376689 + 186131449 = 94617^2 + 13643^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2284627033 + ... + 2284627036.

Almost surely, 2^9138508138 is an apocalyptic number.

9138508138 is a deficient number, since it is larger than the sum of its proper divisors (4569254072).

9138508138 is a wasteful number, since it uses less digits than its factorization.

9138508138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4569254071.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 9138508138 is about 95595.5445509884. The cubic root of 9138508138 is about 2090.7002330007.

The spelling of 9138508138 in words is "nine billion, one hundred thirty-eight million, five hundred eight thousand, one hundred thirty-eight".