90205545 has 8 divisors (see below), whose sum is σ = 144328896. Its totient is φ = 48109616.

The previous prime is 90205543. The next prime is 90205637. The reversal of 90205545 is 54550209.

It is a happy number.

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 90205545 - 2¹ = 90205543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90205541) by changing a digit.

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, 3006837 + ... + 3006866.

It is an arithmetic number, because the mean of its divisors is an integer number (18041112).

Almost surely, 2^90205545 is an apocalyptic number.

It is an amenable number.

90205545 is a deficient number, since it is larger than the sum of its proper divisors (54123351).

90205545 is a wasteful number, since it uses less digits than its factorization.

90205545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6013711.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 90205545 is about 9497.6599749623. The cubic root of 90205545 is about 448.4813746524.

The spelling of 90205545 in words is "ninety million, two hundred five thousand, five hundred forty-five".