99523187 has 2 divisors, whose sum is σ = 99523188. Its totient is φ = 99523186.

The previous prime is 99523183. The next prime is 99523201. The reversal of 99523187 is 78132599.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99523187 - 2² = 99523183 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99523181) 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 as a sum of consecutive naturals, namely, 49761593 + 49761594.

It is an arithmetic number, because the mean of its divisors is an integer number (49761594).

Almost surely, 2^99523187 is an apocalyptic number.

99523187 is a deficient number, since it is larger than the sum of its proper divisors (1).

99523187 is an equidigital number, since it uses as much as digits as its factorization.

99523187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 99523187 is about 9976.1308632155. The cubic root of 99523187 is about 463.4199844264.

The spelling of 99523187 in words is "ninety-nine million, five hundred twenty-three thousand, one hundred eighty-seven".