99865147 has 2 divisors, whose sum is σ = 99865148. Its totient is φ = 99865146.

The previous prime is 99865141. The next prime is 99865187. The reversal of 99865147 is 74156899.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99865147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99865147.

It is not a weakly prime, because it can be changed into another prime (99865141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49932573 + 49932574.

It is an arithmetic number, because the mean of its divisors is an integer number (49932574).

Almost surely, 2^99865147 is an apocalyptic number.

99865147 is a deficient number, since it is larger than the sum of its proper divisors (1).

99865147 is an equidigital number, since it uses as much as digits as its factorization.

99865147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 49.

The square root of 99865147 is about 9993.2550752995. The cubic root of 99865147 is about 463.9501454437.

The spelling of 99865147 in words is "ninety-nine million, eight hundred sixty-five thousand, one hundred forty-seven".