99845789 has 2 divisors, whose sum is σ = 99845790. Its totient is φ = 99845788.

The previous prime is 99845773. The next prime is 99845803. The reversal of 99845789 is 98754899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99400900 + 444889 = 9970^2 + 667^2 .

It is a cyclic number.

It is not a de Polignac number, because 99845789 - 2⁴ = 99845773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99845729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49922894 + 49922895.

It is an arithmetic number, because the mean of its divisors is an integer number (49922895).

Almost surely, 2^99845789 is an apocalyptic number.

It is an amenable number.

99845789 is a deficient number, since it is larger than the sum of its proper divisors (1).

99845789 is an equidigital number, since it uses as much as digits as its factorization.

99845789 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 99845789 is about 9992.2864750767. The cubic root of 99845789 is about 463.9201659245.

It can be divided in two parts, 9984 and 5789, that multiplied together give a triangular number (57797376 = T₁₀₇₅₁).

The spelling of 99845789 in words is "ninety-nine million, eight hundred forty-five thousand, seven hundred eighty-nine".