99772868243 has 2 divisors, whose sum is σ = 99772868244. Its totient is φ = 99772868242.

The previous prime is 99772868197. The next prime is 99772868323. The reversal of 99772868243 is 34286827799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99772868243 - 2⁶ = 99772868179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99772868243.

It is not a weakly prime, because it can be changed into another prime (99772868443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49886434121 + 49886434122.

It is an arithmetic number, because the mean of its divisors is an integer number (49886434122).

Almost surely, 2^99772868243 is an apocalyptic number.

99772868243 is a deficient number, since it is larger than the sum of its proper divisors (1).

99772868243 is an equidigital number, since it uses as much as digits as its factorization.

99772868243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73156608, while the sum is 65.

The spelling of 99772868243 in words is "ninety-nine billion, seven hundred seventy-two million, eight hundred sixty-eight thousand, two hundred forty-three".