9139709 has 2 divisors, whose sum is σ = 9139710. Its totient is φ = 9139708.

The previous prime is 9139687. The next prime is 9139721. The reversal of 9139709 is 9079319.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9132484 + 7225 = 3022^2 + 85^2 .

It is a cyclic number.

It is not a de Polignac number, because 9139709 - 2⁸ = 9139453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9139769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4569854 + 4569855.

It is an arithmetic number, because the mean of its divisors is an integer number (4569855).

Almost surely, 2^9139709 is an apocalyptic number.

It is an amenable number.

9139709 is a deficient number, since it is larger than the sum of its proper divisors (1).

9139709 is an equidigital number, since it uses as much as digits as its factorization.

9139709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 9139709 is about 3023.1951640607. The cubic root of 9139709 is about 209.0791806390.

The spelling of 9139709 in words is "nine million, one hundred thirty-nine thousand, seven hundred nine".