9138637 has 2 divisors, whose sum is σ = 9138638. Its totient is φ = 9138636.

The previous prime is 9138607. The next prime is 9138697. The reversal of 9138637 is 7368319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8874441 + 264196 = 2979^2 + 514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9138637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9138596 and 9138605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9138607) by changing a digit.

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, 4569318 + 4569319.

It is an arithmetic number, because the mean of its divisors is an integer number (4569319).

Almost surely, 2^9138637 is an apocalyptic number.

It is an amenable number.

9138637 is a deficient number, since it is larger than the sum of its proper divisors (1).

9138637 is an equidigital number, since it uses as much as digits as its factorization.

9138637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 9138637 is about 3023.0178629972. The cubic root of 9138637 is about 209.0710059935.

The spelling of 9138637 in words is "nine million, one hundred thirty-eight thousand, six hundred thirty-seven".