9697639 has 12 divisors (see below), whose sum is σ = 11333424. Its totient is φ = 8297856.

The previous prime is 9697603. The next prime is 9697691. The reversal of 9697639 is 9367969.

It is not a de Polignac number, because 9697639 - 2⁷ = 9697511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

9697639 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9697592 and 9697601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9697439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16519 + ... + 17095.

It is an arithmetic number, because the mean of its divisors is an integer number (944452).

Almost surely, 2^9697639 is an apocalyptic number.

9697639 is a deficient number, since it is larger than the sum of its proper divisors (1635785).

9697639 is an frugal number, since it uses more digits than its factorization.

With its predecessor (9697638) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (612).

9697639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 584 counting only the distinct ones).

The product of its digits is 551124, while the sum is 49.

The square root of 9697639 is about 3114.1032417054. The cubic root of 9697639 is about 213.2498189273.

The spelling of 9697639 in words is "nine million, six hundred ninety-seven thousand, six hundred thirty-nine".