99691222 has 4 divisors (see below), whose sum is σ = 149536836. Its totient is φ = 49845610.

The previous prime is 99691219. The next prime is 99691231. The reversal of 99691222 is 22219699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22219699 = 331 ⋅67129.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24922804 + ... + 24922807.

It is an arithmetic number, because the mean of its divisors is an integer number (37384209).

Almost surely, 2^99691222 is an apocalyptic number.

99691222 is a deficient number, since it is larger than the sum of its proper divisors (49845614).

99691222 is a wasteful number, since it uses less digits than its factorization.

99691222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49845613.

The product of its digits is 34992, while the sum is 40.

The square root of 99691222 is about 9984.5491635827. The cubic root of 99691222 is about 463.6806506249.

The spelling of 99691222 in words is "ninety-nine million, six hundred ninety-one thousand, two hundred twenty-two".