9138697 has 2 divisors, whose sum is σ = 9138698. Its totient is φ = 9138696.

The previous prime is 9138637. The next prime is 9138719. The reversal of 9138697 is 7968319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9114361 + 24336 = 3019^2 + 156^2 .

It is an emirp because it is prime and its reverse (7968319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9138697 - 2¹⁹ = 8614409 is a prime.

9138697 is a lucky number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4569348 + 4569349.

It is an arithmetic number, because the mean of its divisors is an integer number (4569349).

Almost surely, 2^9138697 is an apocalyptic number.

It is an amenable number.

9138697 is a deficient number, since it is larger than the sum of its proper divisors (1).

9138697 is an equidigital number, since it uses as much as digits as its factorization.

9138697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 9138697 is about 3023.0277868389. The cubic root of 9138697 is about 209.0714635465.

The spelling of 9138697 in words is "nine million, one hundred thirty-eight thousand, six hundred ninety-seven".