90900305 has 8 divisors (see below), whose sum is σ = 112028712. Its totient is φ = 70754688.

The previous prime is 90900283. The next prime is 90900361. The reversal of 90900305 is 50300909.

It can be written as a sum of positive squares in 4 ways, for example, as 2972176 + 87928129 = 1724^2 + 9377^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90900305 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245492 + ... + 245861.

It is an arithmetic number, because the mean of its divisors is an integer number (14003589).

Almost surely, 2^90900305 is an apocalyptic number.

It is an amenable number.

90900305 is a deficient number, since it is larger than the sum of its proper divisors (21128407).

90900305 is a wasteful number, since it uses less digits than its factorization.

90900305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491395.

The product of its (nonzero) digits is 1215, while the sum is 26.

The square root of 90900305 is about 9534.1651443637. The cubic root of 90900305 is about 449.6298272644.

The spelling of 90900305 in words is "ninety million, nine hundred thousand, three hundred five".