9727138 has 4 divisors (see below), whose sum is σ = 14590710. Its totient is φ = 4863568.

The previous prime is 9727129. The next prime is 9727139. The reversal of 9727138 is 8317279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8317279 = 709 ⋅11731.

It can be written as a sum of positive squares in only one way, i.e., 9715689 + 11449 = 3117^2 + 107^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9727097 and 9727106.

It is not an unprimeable number, because it can be changed into a prime (9727139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2431783 + ... + 2431786.

Almost surely, 2^9727138 is an apocalyptic number.

9727138 is a deficient number, since it is larger than the sum of its proper divisors (4863572).

9727138 is a wasteful number, since it uses less digits than its factorization.

9727138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4863571.

The product of its digits is 21168, while the sum is 37.

The square root of 9727138 is about 3118.8360008183. The cubic root of 9727138 is about 213.4658264423.

The spelling of 9727138 in words is "nine million, seven hundred twenty-seven thousand, one hundred thirty-eight".