9138229 has 2 divisors, whose sum is σ = 9138230. Its totient is φ = 9138228.

The previous prime is 9138209. The next prime is 9138247. The reversal of 9138229 is 9228319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5130225 + 4008004 = 2265^2 + 2002^2 .

It is a cyclic number.

It is not a de Polignac number, because 9138229 - 2¹¹ = 9136181 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9138194 and 9138203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9138209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4569114 + 4569115.

It is an arithmetic number, because the mean of its divisors is an integer number (4569115).

Almost surely, 2^9138229 is an apocalyptic number.

It is an amenable number.

9138229 is a deficient number, since it is larger than the sum of its proper divisors (1).

9138229 is an equidigital number, since it uses as much as digits as its factorization.

9138229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 9138229 is about 3022.9503800096. The cubic root of 9138229 is about 209.0678945798.

The spelling of 9138229 in words is "nine million, one hundred thirty-eight thousand, two hundred twenty-nine".