99885917 has 2 divisors, whose sum is σ = 99885918. Its totient is φ = 99885916.

The previous prime is 99885893. The next prime is 99885943. The reversal of 99885917 is 71958899.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90516196 + 9369721 = 9514^2 + 3061^2 .

It is a cyclic number.

It is not a de Polignac number, because 99885917 - 2¹⁰ = 99884893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99885967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49942958 + 49942959.

It is an arithmetic number, because the mean of its divisors is an integer number (49942959).

Almost surely, 2^99885917 is an apocalyptic number.

It is an amenable number.

99885917 is a deficient number, since it is larger than the sum of its proper divisors (1).

99885917 is an equidigital number, since it uses as much as digits as its factorization.

99885917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 56.

The square root of 99885917 is about 9994.2942222050. The cubic root of 99885917 is about 463.9823074036.

The spelling of 99885917 in words is "ninety-nine million, eight hundred eighty-five thousand, nine hundred seventeen".