9139687 has 2 divisors, whose sum is σ = 9139688. Its totient is φ = 9139686.

The previous prime is 9139661. The next prime is 9139709. The reversal of 9139687 is 7869319.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9139687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9139787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4569843 + 4569844.

It is an arithmetic number, because the mean of its divisors is an integer number (4569844).

Almost surely, 2^9139687 is an apocalyptic number.

9139687 is a deficient number, since it is larger than the sum of its proper divisors (1).

9139687 is an equidigital number, since it uses as much as digits as its factorization.

9139687 is an odious number, because the sum of its binary digits is odd.

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

The square root of 9139687 is about 3023.1915255240. The cubic root of 9139687 is about 209.0790128822.

The spelling of 9139687 in words is "nine million, one hundred thirty-nine thousand, six hundred eighty-seven".