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90175241 = 136936557
BaseRepresentation
bin1010101111111…
…11011100001001
320021200101011202
411113333130021
5141041101431
612540433545
72143322402
oct527773411
9207611152
1090175241
11469a0aa2
12262488b5
13158b3940
14bd949a9
157db38cb
hex55ff709

90175241 has 4 divisors (see below), whose sum is σ = 97111812. Its totient is φ = 83238672.

The previous prime is 90175231. The next prime is 90175271. The reversal of 90175241 is 14257109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14257109 = 66121569.

It can be written as a sum of positive squares in 2 ways, for example, as 13104400 + 77070841 = 3620^2 + 8779^2 .

It is a cyclic number.

It is not a de Polignac number, because 90175241 - 218 = 89913097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90175231) by changing a digit.

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, 3468266 + ... + 3468291.

It is an arithmetic number, because the mean of its divisors is an integer number (24277953).

Almost surely, 290175241 is an apocalyptic number.

It is an amenable number.

90175241 is a deficient number, since it is larger than the sum of its proper divisors (6936571).

90175241 is a wasteful number, since it uses less digits than its factorization.

90175241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6936570.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 90175241 is about 9496.0645006234. The cubic root of 90175241 is about 448.4311475044.

The spelling of 90175241 in words is "ninety million, one hundred seventy-five thousand, two hundred forty-one".

Divisors: 1 13 6936557 90175241