99167221 has 4 divisors (see below), whose sum is σ = 99284332. Its totient is φ = 99050112.

The previous prime is 99167209. The next prime is 99167261. The reversal of 99167221 is 12276199.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8346321 + 90820900 = 2889^2 + 9530^2 .

It is a cyclic number.

It is not a de Polignac number, because 99167221 - 2¹³ = 99159029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99167261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57276 + ... + 58981.

It is an arithmetic number, because the mean of its divisors is an integer number (24821083).

Almost surely, 2^99167221 is an apocalyptic number.

It is an amenable number.

99167221 is a deficient number, since it is larger than the sum of its proper divisors (117111).

99167221 is a wasteful number, since it uses less digits than its factorization.

99167221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117110.

The product of its digits is 13608, while the sum is 37.

The square root of 99167221 is about 9958.2739970338. The cubic root of 99167221 is about 462.8668174423.

The spelling of 99167221 in words is "ninety-nine million, one hundred sixty-seven thousand, two hundred twenty-one".