9697521 has 4 divisors (see below), whose sum is σ = 12930032. Its totient is φ = 6465012.

The previous prime is 9697511. The next prime is 9697549. The reversal of 9697521 is 1257969.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9697521 - 2¹¹ = 9695473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9697521.

It is not an unprimeable number, because it can be changed into a prime (9697511) 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, 1616251 + ... + 1616256.

It is an arithmetic number, because the mean of its divisors is an integer number (3232508).

Almost surely, 2^9697521 is an apocalyptic number.

It is an amenable number.

9697521 is a deficient number, since it is larger than the sum of its proper divisors (3232511).

9697521 is a wasteful number, since it uses less digits than its factorization.

9697521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232510.

The product of its digits is 34020, while the sum is 39.

The square root of 9697521 is about 3114.0842955835. The cubic root of 9697521 is about 213.2489539889.

The spelling of 9697521 in words is "nine million, six hundred ninety-seven thousand, five hundred twenty-one".