99865061 has 2 divisors, whose sum is σ = 99865062. Its totient is φ = 99865060.

The previous prime is 99865039. The next prime is 99865069. The reversal of 99865061 is 16056899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99700225 + 164836 = 9985^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 99865061 - 2⁶ = 99864997 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 (99865069) 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, 49932530 + 49932531.

It is an arithmetic number, because the mean of its divisors is an integer number (49932531).

Almost surely, 2^99865061 is an apocalyptic number.

It is an amenable number.

99865061 is a deficient number, since it is larger than the sum of its proper divisors (1).

99865061 is an equidigital number, since it uses as much as digits as its factorization.

99865061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 99865061 is about 9993.2507723963. The cubic root of 99865061 is about 463.9500122650.

The spelling of 99865061 in words is "ninety-nine million, eight hundred sixty-five thousand, sixty-one".