99772868179 has 2 divisors, whose sum is σ = 99772868180. Its totient is φ = 99772868178.

The previous prime is 99772868177. The next prime is 99772868197. The reversal of 99772868179 is 97186827799.

Together with next prime (99772868197) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99772868179 - 2¹ = 99772868177 is a prime.

It is a super-2 number, since 2×99772868179² (a number of 23 digits) contains 22 as substring.

Together with 99772868177, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (99772868177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49886434089 + 49886434090.

It is an arithmetic number, because the mean of its divisors is an integer number (49886434090).

Almost surely, 2^99772868179 is an apocalyptic number.

99772868179 is a deficient number, since it is larger than the sum of its proper divisors (1).

99772868179 is an equidigital number, since it uses as much as digits as its factorization.

99772868179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192036096, while the sum is 73.

The spelling of 99772868179 in words is "ninety-nine billion, seven hundred seventy-two million, eight hundred sixty-eight thousand, one hundred seventy-nine".