99999772199 has 4 divisors (see below), whose sum is σ = 100325504664. Its totient is φ = 99674039736.

The previous prime is 99999772183. The next prime is 99999772211. The reversal of 99999772199 is 99127799999.

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 99999772199 - 2⁴ = 99999772183 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 (99999772099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162865772 + ... + 162866385.

It is an arithmetic number, because the mean of its divisors is an integer number (25081376166).

Almost surely, 2^99999772199 is an apocalyptic number.

99999772199 is a deficient number, since it is larger than the sum of its proper divisors (325732465).

99999772199 is a wasteful number, since it uses less digits than its factorization.

99999772199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325732464.

The product of its digits is 468730962, while the sum is 80.

The spelling of 99999772199 in words is "ninety-nine billion, nine hundred ninety-nine million, seven hundred seventy-two thousand, one hundred ninety-nine".