99890017 has 2 divisors, whose sum is σ = 99890018. Its totient is φ = 99890016.

The previous prime is 99890003. The next prime is 99890033. The reversal of 99890017 is 71009899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86044176 + 13845841 = 9276^2 + 3721^2 .

It is a cyclic number.

It is not a de Polignac number, because 99890017 - 2¹¹ = 99887969 is a prime.

It is not a weakly prime, because it can be changed into another prime (99890117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49945008 + 49945009.

It is an arithmetic number, because the mean of its divisors is an integer number (49945009).

Almost surely, 2^99890017 is an apocalyptic number.

It is an amenable number.

99890017 is a deficient number, since it is larger than the sum of its proper divisors (1).

99890017 is an equidigital number, since it uses as much as digits as its factorization.

99890017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 99890017 is about 9994.4993371354. The cubic root of 99890017 is about 463.9886556506.

The spelling of 99890017 in words is "ninety-nine million, eight hundred ninety thousand, seventeen".