9997693 has 4 divisors (see below), whose sum is σ = 10100860. Its totient is φ = 9894528.

The previous prime is 9997661. The next prime is 9997697. The reversal of 9997693 is 3967999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3967999 = 7 ⋅566857.

It can be written as a sum of positive squares in 2 ways, for example, as 6692569 + 3305124 = 2587^2 + 1818^2 .

It is a cyclic number.

It is not a de Polignac number, because 9997693 - 2⁵ = 9997661 is a prime.

It is a Duffinian number.

9997693 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9997693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997697) 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, 51438 + ... + 51631.

It is an arithmetic number, because the mean of its divisors is an integer number (2525215).

Almost surely, 2^9997693 is an apocalyptic number.

It is an amenable number.

9997693 is a deficient number, since it is larger than the sum of its proper divisors (103167).

9997693 is a wasteful number, since it uses less digits than its factorization.

9997693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103166.

The product of its digits is 826686, while the sum is 52.

The square root of 9997693 is about 3161.9128703998. The cubic root of 9997693 is about 215.4269001262.

The spelling of 9997693 in words is "nine million, nine hundred ninety-seven thousand, six hundred ninety-three".