9997667999 has 4 divisors (see below), whose sum is σ = 10906546920. Its totient is φ = 9088789080.

The previous prime is 9997667983. The next prime is 9997668013.

It is a happy number.

9997667999 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 9997667999 - 2⁴ = 9997667983 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 (9997667299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454439444 + ... + 454439465.

It is an arithmetic number, because the mean of its divisors is an integer number (2726636730).

Almost surely, 2^9997667999 is an apocalyptic number.

9997667999 is a deficient number, since it is larger than the sum of its proper divisors (908878921).

9997667999 is a wasteful number, since it uses less digits than its factorization.

9997667999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908878920.

The product of its digits is 937461924, while the sum is 80.

The square root of 9997667999 is about 99988.3393151421. The cubic root of 9997667999 is about 2154.2672055504.

The spelling of 9997667999 in words is "nine billion, nine hundred ninety-seven million, six hundred sixty-seven thousand, nine hundred ninety-nine".