99943171 has 4 divisors (see below), whose sum is σ = 99979000. Its totient is φ = 99907344.

The previous prime is 99943139. The next prime is 99943177. The reversal of 99943171 is 17134999.

It is a happy number.

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 99943171 - 2⁵ = 99943139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99943177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13341 + ... + 19438.

It is an arithmetic number, because the mean of its divisors is an integer number (24994750).

Almost surely, 2^99943171 is an apocalyptic number.

99943171 is a deficient number, since it is larger than the sum of its proper divisors (35829).

99943171 is a wasteful number, since it uses less digits than its factorization.

99943171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35828.

The product of its digits is 61236, while the sum is 43.

The square root of 99943171 is about 9997.1581461933. The cubic root of 99943171 is about 464.0709410830.

The spelling of 99943171 in words is "ninety-nine million, nine hundred forty-three thousand, one hundred seventy-one".