99171723 has 8 divisors (see below), whose sum is σ = 151118848. Its totient is φ = 56669544.

The previous prime is 99171713. The next prime is 99171757. The reversal of 99171723 is 32717199.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99171723 - 2⁴ = 99171707 is a prime.

It is the 9959-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99171713) by changing a digit.

It is a nontrivial repunit in base 9958.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2361211 + ... + 2361252.

It is an arithmetic number, because the mean of its divisors is an integer number (18889856).

Almost surely, 2^99171723 is an apocalyptic number.

99171723 is a deficient number, since it is larger than the sum of its proper divisors (51947125).

99171723 is a wasteful number, since it uses less digits than its factorization.

99171723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722473.

The product of its digits is 23814, while the sum is 39.

The square root of 99171723 is about 9958.5000376563. The cubic root of 99171723 is about 462.8738217556.

The spelling of 99171723 in words is "ninety-nine million, one hundred seventy-one thousand, seven hundred twenty-three".