99866387 has 2 divisors, whose sum is σ = 99866388. Its totient is φ = 99866386.

The previous prime is 99866383. The next prime is 99866411. The reversal of 99866387 is 78366899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99866387 - 2² = 99866383 is a prime.

It is not a weakly prime, because it can be changed into another prime (99866383) 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, 49933193 + 49933194.

It is an arithmetic number, because the mean of its divisors is an integer number (49933194).

Almost surely, 2^99866387 is an apocalyptic number.

99866387 is a deficient number, since it is larger than the sum of its proper divisors (1).

99866387 is an equidigital number, since it uses as much as digits as its factorization.

99866387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 56.

The square root of 99866387 is about 9993.3171169537. The cubic root of 99866387 is about 463.9520656859.

The spelling of 99866387 in words is "ninety-nine million, eight hundred sixty-six thousand, three hundred eighty-seven".