9697561 has 4 divisors (see below), whose sum is σ = 9732112. Its totient is φ = 9663012.

The previous prime is 9697549. The next prime is 9697573. The reversal of 9697561 is 1657969.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1657969 = 977 ⋅1697.

It is an interprime number because it is at equal distance from previous prime (9697549) and next prime (9697573).

It is a cyclic number.

It is not a de Polignac number, because 9697561 - 2¹³ = 9689369 is a prime.

It is a Duffinian number.

9697561 is a lucky number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (9697511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16851 + ... + 17416.

It is an arithmetic number, because the mean of its divisors is an integer number (2433028).

Almost surely, 2^9697561 is an apocalyptic number.

It is an amenable number.

9697561 is a deficient number, since it is larger than the sum of its proper divisors (34551).

9697561 is a wasteful number, since it uses less digits than its factorization.

9697561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34550.

The product of its digits is 102060, while the sum is 43.

The square root of 9697561 is about 3114.0907180106. The cubic root of 9697561 is about 213.2492471892.

The spelling of 9697561 in words is "nine million, six hundred ninety-seven thousand, five hundred sixty-one".