99680985 has 12 divisors (see below), whose sum is σ = 172780452. Its totient is φ = 53163168.

The previous prime is 99680953. The next prime is 99680993. The reversal of 99680985 is 58908699.

It can be written as a sum of positive squares in 2 ways, for example, as 36144144 + 63536841 = 6012^2 + 7971^2 .

It is not a de Polignac number, because 99680985 - 2⁵ = 99680953 is a prime.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 1107522 + ... + 1107611.

It is an arithmetic number, because the mean of its divisors is an integer number (14398371).

Almost surely, 2^99680985 is an apocalyptic number.

It is an amenable number.

99680985 is a deficient number, since it is larger than the sum of its proper divisors (73099467).

99680985 is a wasteful number, since it uses less digits than its factorization.

99680985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215144 (or 2215141 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The square root of 99680985 is about 9984.0365083467. The cubic root of 99680985 is about 463.6647787450.

The spelling of 99680985 in words is "ninety-nine million, six hundred eighty thousand, nine hundred eighty-five".