9994139 has 2 divisors, whose sum is σ = 9994140. Its totient is φ = 9994138.

The previous prime is 9994109. The next prime is 9994151. The reversal of 9994139 is 9314999.

It is a strong prime.

It is an emirp because it is prime and its reverse (9314999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9994139 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9994139.

It is not a weakly prime, because it can be changed into another prime (9994109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4997069 + 4997070.

It is an arithmetic number, because the mean of its divisors is an integer number (4997070).

Almost surely, 2^9994139 is an apocalyptic number.

9994139 is a deficient number, since it is larger than the sum of its proper divisors (1).

9994139 is an equidigital number, since it uses as much as digits as its factorization.

9994139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78732, while the sum is 44.

The square root of 9994139 is about 3161.3508188747. The cubic root of 9994139 is about 215.4013703050.

The spelling of 9994139 in words is "nine million, nine hundred ninety-four thousand, one hundred thirty-nine".