99091173 has 8 divisors (see below), whose sum is σ = 136677600. Its totient is φ = 63782768.

The previous prime is 99091163. The next prime is 99091189. The reversal of 99091173 is 37119099.

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

It is a cyclic number.

It is not a de Polignac number, because 99091173 - 2⁹ = 99090661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99091133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569403 + ... + 569576.

It is an arithmetic number, because the mean of its divisors is an integer number (17084700).

Almost surely, 2^99091173 is an apocalyptic number.

It is an amenable number.

99091173 is a deficient number, since it is larger than the sum of its proper divisors (37586427).

99091173 is a wasteful number, since it uses less digits than its factorization.

99091173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139011.

The product of its (nonzero) digits is 15309, while the sum is 39.

The square root of 99091173 is about 9954.4549323406. The cubic root of 99091173 is about 462.7484681963.

The spelling of 99091173 in words is "ninety-nine million, ninety-one thousand, one hundred seventy-three".