99380191 has 4 divisors (see below), whose sum is σ = 100779984. Its totient is φ = 97980400.

The previous prime is 99380189. The next prime is 99380213. The reversal of 99380191 is 19108399.

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 99380191 - 2¹ = 99380189 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99380111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699790 + ... + 699931.

It is an arithmetic number, because the mean of its divisors is an integer number (25194996).

Almost surely, 2^99380191 is an apocalyptic number.

99380191 is a deficient number, since it is larger than the sum of its proper divisors (1399793).

99380191 is a wasteful number, since it uses less digits than its factorization.

99380191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399792.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 99380191 is about 9968.9613802041. The cubic root of 99380191 is about 463.1979290801.

The spelling of 99380191 in words is "ninety-nine million, three hundred eighty thousand, one hundred ninety-one".