90105317 has 4 divisors (see below), whose sum is σ = 90499020. Its totient is φ = 89711616.

The previous prime is 90105307. The next prime is 90105347. The reversal of 90105317 is 71350109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71350109 = 67 ⋅1064927.

It can be written as a sum of positive squares in 2 ways, for example, as 39325441 + 50779876 = 6271^2 + 7126^2 .

It is a cyclic number.

It is not a de Polignac number, because 90105317 - 2²⁶ = 22996453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90105307) 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 in 3 ways as a sum of consecutive naturals, for example, 196508 + ... + 196965.

It is an arithmetic number, because the mean of its divisors is an integer number (22624755).

Almost surely, 2^90105317 is an apocalyptic number.

It is an amenable number.

90105317 is a deficient number, since it is larger than the sum of its proper divisors (393703).

90105317 is a wasteful number, since it uses less digits than its factorization.

90105317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393702.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 90105317 is about 9492.3820508869. The cubic root of 90105317 is about 448.3152095172.

The spelling of 90105317 in words is "ninety million, one hundred five thousand, three hundred seventeen".