99989171 has 2 divisors, whose sum is σ = 99989172. Its totient is φ = 99989170.

The previous prime is 99989159. The next prime is 99989177. The reversal of 99989171 is 17198999.

It is a strong prime.

It is an emirp because it is prime and its reverse (17198999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99989171 - 2⁶ = 99989107 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99989177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994585 + 49994586.

It is an arithmetic number, because the mean of its divisors is an integer number (49994586).

Almost surely, 2^99989171 is an apocalyptic number.

99989171 is a deficient number, since it is larger than the sum of its proper divisors (1).

99989171 is an equidigital number, since it uses as much as digits as its factorization.

99989171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 53.

The square root of 99989171 is about 9999.4585353408. The cubic root of 99989171 is about 464.1421281680.

The spelling of 99989171 in words is "ninety-nine million, nine hundred eighty-nine thousand, one hundred seventy-one".