90945055 has 4 divisors (see below), whose sum is σ = 109134072. Its totient is φ = 72756040.

The previous prime is 90945017. The next prime is 90945091. The reversal of 90945055 is 55054909.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 90945055 - 2¹¹ = 90943007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 9094501 + ... + 9094510.

It is an arithmetic number, because the mean of its divisors is an integer number (27283518).

Almost surely, 2^90945055 is an apocalyptic number.

90945055 is a deficient number, since it is larger than the sum of its proper divisors (18189017).

90945055 is a wasteful number, since it uses less digits than its factorization.

90945055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18189016.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 90945055 is about 9536.5116788058. The cubic root of 90945055 is about 449.7035990515.

The spelling of 90945055 in words is "ninety million, nine hundred forty-five thousand, fifty-five".