99897667 has 2 divisors, whose sum is σ = 99897668. Its totient is φ = 99897666.

The previous prime is 99897641. The next prime is 99897673. The reversal of 99897667 is 76679899.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99897667 is a prime.

It is not a weakly prime, because it can be changed into another prime (99897617) 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 as a sum of consecutive naturals, namely, 49948833 + 49948834.

It is an arithmetic number, because the mean of its divisors is an integer number (49948834).

Almost surely, 2^99897667 is an apocalyptic number.

99897667 is a deficient number, since it is larger than the sum of its proper divisors (1).

99897667 is an equidigital number, since it uses as much as digits as its factorization.

99897667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10287648, while the sum is 61.

The square root of 99897667 is about 9994.8820403244. The cubic root of 99897667 is about 464.0005000862. Note that the first 3 decimals are identical.

The spelling of 99897667 in words is "ninety-nine million, eight hundred ninety-seven thousand, six hundred sixty-seven".