9138719 has 2 divisors, whose sum is σ = 9138720. Its totient is φ = 9138718.

The previous prime is 9138697. The next prime is 9138721. The reversal of 9138719 is 9178319.

It is a strong prime.

It is an emirp because it is prime and its reverse (9178319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9138719 - 2⁸ = 9138463 is a prime.

It is a super-2 number, since 2×9138719² = 167032369921922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 9138721, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9138739) 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, 4569359 + 4569360.

It is an arithmetic number, because the mean of its divisors is an integer number (4569360).

Almost surely, 2^9138719 is an apocalyptic number.

9138719 is a deficient number, since it is larger than the sum of its proper divisors (1).

9138719 is an equidigital number, since it uses as much as digits as its factorization.

9138719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 38.

The square root of 9138719 is about 3023.0314255727. The cubic root of 9138719 is about 209.0716313154.

The spelling of 9138719 in words is "nine million, one hundred thirty-eight thousand, seven hundred nineteen".