99997667 has 12 divisors (see below), whose sum is σ = 125617968. Its totient is φ = 77919600.

The previous prime is 99997649. The next prime is 99997669. The reversal of 99997667 is 76679999.

It is not a de Polignac number, because 99997667 - 2⁸ = 99997411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99997669) 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 11 ways as a sum of consecutive naturals, for example, 58184 + ... + 59877.

It is an arithmetic number, because the mean of its divisors is an integer number (10468164).

Almost surely, 2^99997667 is an apocalyptic number.

99997667 is a deficient number, since it is larger than the sum of its proper divisors (25620301).

99997667 is a wasteful number, since it uses less digits than its factorization.

99997667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118090 (or 118079 counting only the distinct ones).

The product of its digits is 11573604, while the sum is 62.

The square root of 99997667 is about 9999.8833493196. The cubic root of 99997667 is about 464.1552737243.

The spelling of 99997667 in words is "ninety-nine million, nine hundred ninety-seven thousand, six hundred sixty-seven".