90898117 has 2 divisors, whose sum is σ = 90898118. Its totient is φ = 90898116.

The previous prime is 90898079. The next prime is 90898121. The reversal of 90898117 is 71189809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90897156 + 961 = 9534^2 + 31^2 .

It is a cyclic number.

It is not a de Polignac number, because 90898117 - 2¹⁵ = 90865349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90898177) 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, 45449058 + 45449059.

It is an arithmetic number, because the mean of its divisors is an integer number (45449059).

Almost surely, 2^90898117 is an apocalyptic number.

It is an amenable number.

90898117 is a deficient number, since it is larger than the sum of its proper divisors (1).

90898117 is an equidigital number, since it uses as much as digits as its factorization.

90898117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 90898117 is about 9534.0503984403. The cubic root of 90898117 is about 449.6262196566.

The spelling of 90898117 in words is "ninety million, eight hundred ninety-eight thousand, one hundred seventeen".