9997161 has 4 divisors (see below), whose sum is σ = 13329552. Its totient is φ = 6664772.

The previous prime is 9997133. The next prime is 9997177. The reversal of 9997161 is 1617999.

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 a cyclic number.

It is not a de Polignac number, because 9997161 - 2⁵ = 9997129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9997661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1666191 + ... + 1666196.

It is an arithmetic number, because the mean of its divisors is an integer number (3332388).

Almost surely, 2^9997161 is an apocalyptic number.

It is an amenable number.

9997161 is a deficient number, since it is larger than the sum of its proper divisors (3332391).

9997161 is a wasteful number, since it uses less digits than its factorization.

9997161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332390.

The product of its digits is 30618, while the sum is 42.

The square root of 9997161 is about 3161.8287429904. The cubic root of 9997161 is about 215.4230789399.

The spelling of 9997161 in words is "nine million, nine hundred ninety-seven thousand, one hundred sixty-one".