9717139 has 4 divisors (see below), whose sum is σ = 9724000. Its totient is φ = 9710280.

The previous prime is 9717119. The next prime is 9717143. The reversal of 9717139 is 9317179.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9717139 - 2⁵ = 9717107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9717098 and 9717107.

It is not an unprimeable number, because it can be changed into a prime (9717119) 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, 432 + ... + 4429.

It is an arithmetic number, because the mean of its divisors is an integer number (2431000).

Almost surely, 2^9717139 is an apocalyptic number.

9717139 is a deficient number, since it is larger than the sum of its proper divisors (6861).

9717139 is a wasteful number, since it uses less digits than its factorization.

9717139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6860.

The product of its digits is 11907, while the sum is 37.

The square root of 9717139 is about 3117.2325867667. The cubic root of 9717139 is about 213.3926573839.

The spelling of 9717139 in words is "nine million, seven hundred seventeen thousand, one hundred thirty-nine".