99772859 has 2 divisors, whose sum is σ = 99772860. Its totient is φ = 99772858.

The previous prime is 99772801. The next prime is 99772877. The reversal of 99772859 is 95827799.

It is a strong prime.

It is an emirp because it is prime and its reverse (95827799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99772859 - 2¹² = 99768763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99772259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49886429 + 49886430.

It is an arithmetic number, because the mean of its divisors is an integer number (49886430).

Almost surely, 2^99772859 is an apocalyptic number.

99772859 is a deficient number, since it is larger than the sum of its proper divisors (1).

99772859 is an equidigital number, since it uses as much as digits as its factorization.

99772859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 56.

The square root of 99772859 is about 9988.6364935360. The cubic root of 99772859 is about 463.8071852334.

The spelling of 99772859 in words is "ninety-nine million, seven hundred seventy-two thousand, eight hundred fifty-nine".