9917967 has 4 divisors (see below), whose sum is σ = 13223960. Its totient is φ = 6611976.

The previous prime is 9917939. The next prime is 9917969. The reversal of 9917967 is 7697199.

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

It is not a de Polignac number, because 9917967 - 2⁶ = 9917903 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 (9917969) 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, 1652992 + ... + 1652997.

It is an arithmetic number, because the mean of its divisors is an integer number (3305990).

Almost surely, 2^9917967 is an apocalyptic number.

9917967 is a deficient number, since it is larger than the sum of its proper divisors (3305993).

9917967 is a wasteful number, since it uses less digits than its factorization.

9917967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305992.

The product of its digits is 214326, while the sum is 48.

The square root of 9917967 is about 3149.2803939948. The cubic root of 9917967 is about 214.8527349203.

The spelling of 9917967 in words is "nine million, nine hundred seventeen thousand, nine hundred sixty-seven".