9730139 has 4 divisors (see below), whose sum is σ = 9800280. Its totient is φ = 9660000.

The previous prime is 9730129. The next prime is 9730141. The reversal of 9730139 is 9310379.

It is a happy number.

9730139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9730139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9730129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34862 + ... + 35139.

It is an arithmetic number, because the mean of its divisors is an integer number (2450070).

Almost surely, 2^9730139 is an apocalyptic number.

9730139 is a deficient number, since it is larger than the sum of its proper divisors (70141).

9730139 is a wasteful number, since it uses less digits than its factorization.

9730139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70140.

The product of its (nonzero) digits is 5103, while the sum is 32.

The square root of 9730139 is about 3119.3170726940. The cubic root of 9730139 is about 213.4877768891.

The spelling of 9730139 in words is "nine million, seven hundred thirty thousand, one hundred thirty-nine".