99135222791 has 4 divisors (see below), whose sum is σ = 108147515784. Its totient is φ = 90122929800.

The previous prime is 99135222779. The next prime is 99135222799. The reversal of 99135222791 is 19722253199.

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

It is a cyclic number.

It is not a de Polignac number, because 99135222791 - 2⁶ = 99135222727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99135222799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4506146480 + ... + 4506146501.

It is an arithmetic number, because the mean of its divisors is an integer number (27036878946).

Almost surely, 2^99135222791 is an apocalyptic number.

99135222791 is a deficient number, since it is larger than the sum of its proper divisors (9012292993).

99135222791 is a wasteful number, since it uses less digits than its factorization.

99135222791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9012292992.

The product of its digits is 612360, while the sum is 50.

The spelling of 99135222791 in words is "ninety-nine billion, one hundred thirty-five million, two hundred twenty-two thousand, seven hundred ninety-one".