90105605 has 8 divisors (see below), whose sum is σ = 112828032. Its totient is φ = 68950288.

The previous prime is 90105569. The next prime is 90105643. The reversal of 90105605 is 50650109.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90105605 - 2⁶ = 90105541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391649 + ... + 391878.

It is an arithmetic number, because the mean of its divisors is an integer number (14103504).

Almost surely, 2^90105605 is an apocalyptic number.

It is an amenable number.

90105605 is a deficient number, since it is larger than the sum of its proper divisors (22722427).

90105605 is a wasteful number, since it uses less digits than its factorization.

90105605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783555.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 90105605 is about 9492.3972209342. The cubic root of 90105605 is about 448.3156871606.

The spelling of 90105605 in words is "ninety million, one hundred five thousand, six hundred five".