99865043 has 4 divisors (see below), whose sum is σ = 103086528. Its totient is φ = 96643560.

The previous prime is 99865039. The next prime is 99865061. The reversal of 99865043 is 34056899.

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 99865043 - 2² = 99865039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99864985 and 99865003.

It is not an unprimeable number, because it can be changed into a prime (99865033) 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 in 3 ways as a sum of consecutive naturals, for example, 1610696 + ... + 1610757.

It is an arithmetic number, because the mean of its divisors is an integer number (25771632).

Almost surely, 2^99865043 is an apocalyptic number.

99865043 is a deficient number, since it is larger than the sum of its proper divisors (3221485).

99865043 is a wasteful number, since it uses less digits than its factorization.

99865043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221484.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 99865043 is about 9993.2498717885. The cubic root of 99865043 is about 463.9499843904.

The spelling of 99865043 in words is "ninety-nine million, eight hundred sixty-five thousand, forty-three".