99660193 has 4 divisors (see below), whose sum is σ = 101540628. Its totient is φ = 97779760.

The previous prime is 99660191. The next prime is 99660221. The reversal of 99660193 is 39106699.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89718784 + 9941409 = 9472^2 + 3153^2 .

It is a cyclic number.

It is not a de Polignac number, because 99660193 - 2¹ = 99660191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99660191) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 940138 + ... + 940243.

It is an arithmetic number, because the mean of its divisors is an integer number (25385157).

Almost surely, 2^99660193 is an apocalyptic number.

It is an amenable number.

99660193 is a deficient number, since it is larger than the sum of its proper divisors (1880435).

99660193 is a wasteful number, since it uses less digits than its factorization.

99660193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880434.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 99660193 is about 9982.9951918249. The cubic root of 99660193 is about 463.6325385993.

The spelling of 99660193 in words is "ninety-nine million, six hundred sixty thousand, one hundred ninety-three".