9139397 has 2 divisors, whose sum is σ = 9139398. Its totient is φ = 9139396.

The previous prime is 9139393. The next prime is 9139439. The reversal of 9139397 is 7939319.

9139397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5262436 + 3876961 = 2294^2 + 1969^2 .

9139397 is a truncatable prime.

It is an emirp because it is prime and its reverse (7939319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9139397 - 2² = 9139393 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9139391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4569698 + 4569699.

It is an arithmetic number, because the mean of its divisors is an integer number (4569699).

Almost surely, 2^9139397 is an apocalyptic number.

It is an amenable number.

9139397 is a deficient number, since it is larger than the sum of its proper divisors (1).

9139397 is an equidigital number, since it uses as much as digits as its factorization.

9139397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45927, while the sum is 41.

The square root of 9139397 is about 3023.1435625851. The cubic root of 9139397 is about 209.0768015171.

The spelling of 9139397 in words is "nine million, one hundred thirty-nine thousand, three hundred ninety-seven".