99143985 has 16 divisors (see below), whose sum is σ = 159226560. Its totient is φ = 52678080.

The previous prime is 99143963. The next prime is 99143999. The reversal of 99143985 is 58934199.

It is not a de Polignac number, because 99143985 - 2⁷ = 99143857 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 8251 + ... + 16320.

It is an arithmetic number, because the mean of its divisors is an integer number (9951660).

Almost surely, 2^99143985 is an apocalyptic number.

It is an amenable number.

99143985 is a deficient number, since it is larger than the sum of its proper divisors (60082575).

99143985 is a wasteful number, since it uses less digits than its factorization.

99143985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24848.

The product of its digits is 349920, while the sum is 48.

The square root of 99143985 is about 9957.1072606455. The cubic root of 99143985 is about 462.8306629771.

It can be divided in two parts, 99143 and 985, that added together give a triangular number (100128 = T₄₄₇).

The spelling of 99143985 in words is "ninety-nine million, one hundred forty-three thousand, nine hundred eighty-five".