9997679 has 4 divisors (see below), whose sum is σ = 10015584. Its totient is φ = 9979776.

The previous prime is 9997661. The next prime is 9997697. The reversal of 9997679 is 9767999.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (9997661) and next prime (9997697).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9997679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997579) 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, 8087 + ... + 9240.

It is an arithmetic number, because the mean of its divisors is an integer number (2503896).

Almost surely, 2^9997679 is an apocalyptic number.

9997679 is a deficient number, since it is larger than the sum of its proper divisors (17905).

9997679 is a wasteful number, since it uses less digits than its factorization.

9997679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17904.

The product of its digits is 1928934, while the sum is 56.

The square root of 9997679 is about 3161.9106565493. The cubic root of 9997679 is about 215.4267995704.

The spelling of 9997679 in words is "nine million, nine hundred ninety-seven thousand, six hundred seventy-nine".