90075055 has 16 divisors (see below), whose sum is σ = 123845184. Its totient is φ = 61608960.

The previous prime is 90075053. The next prime is 90075059. The reversal of 90075055 is 55057009.

It is not a de Polignac number, because 90075055 - 2¹ = 90075053 is a prime.

It is a super-2 number, since 2×90075055² = 16227031066506050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90075053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11679 + ... + 17791.

It is an arithmetic number, because the mean of its divisors is an integer number (7740324).

Almost surely, 2^90075055 is an apocalyptic number.

90075055 is a deficient number, since it is larger than the sum of its proper divisors (33770129).

90075055 is a wasteful number, since it uses less digits than its factorization.

90075055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6546.

The product of its (nonzero) digits is 7875, while the sum is 31.

The square root of 90075055 is about 9490.7879019605. The cubic root of 90075055 is about 448.2650147953.

The spelling of 90075055 in words is "ninety million, seventy-five thousand, fifty-five".