99394171 has 4 divisors (see below), whose sum is σ = 99475000. Its totient is φ = 99313344.

The previous prime is 99394151. The next prime is 99394181. The reversal of 99394171 is 17149399.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17149399 = 79 ⋅217081.

It is a cyclic number.

It is not a de Polignac number, because 99394171 - 2¹¹ = 99392123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99394151) 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, 38541 + ... + 41038.

It is an arithmetic number, because the mean of its divisors is an integer number (24868750).

Almost surely, 2^99394171 is an apocalyptic number.

99394171 is a deficient number, since it is larger than the sum of its proper divisors (80829).

99394171 is a wasteful number, since it uses less digits than its factorization.

99394171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80828.

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

The square root of 99394171 is about 9969.6625319015. The cubic root of 99394171 is about 463.2196477055.

The spelling of 99394171 in words is "ninety-nine million, three hundred ninety-four thousand, one hundred seventy-one".