99854789 has 2 divisors, whose sum is σ = 99854790. Its totient is φ = 99854788.

The previous prime is 99854759. The next prime is 99854819. The reversal of 99854789 is 98745899.

It is a balanced prime because it is at equal distance from previous prime (99854759) and next prime (99854819).

It can be written as a sum of positive squares in only one way, i.e., 78464164 + 21390625 = 8858^2 + 4625^2 .

It is a cyclic number.

It is not a de Polignac number, because 99854789 - 2¹² = 99850693 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99854759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49927394 + 49927395.

It is an arithmetic number, because the mean of its divisors is an integer number (49927395).

Almost surely, 2^99854789 is an apocalyptic number.

It is an amenable number.

99854789 is a deficient number, since it is larger than the sum of its proper divisors (1).

99854789 is an equidigital number, since it uses as much as digits as its factorization.

99854789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 59.

The square root of 99854789 is about 9992.7368123052. The cubic root of 99854789 is about 463.9341046063.

The spelling of 99854789 in words is "ninety-nine million, eight hundred fifty-four thousand, seven hundred eighty-nine".