90207505 has 8 divisors (see below), whose sum is σ = 108699624. Its totient is φ = 71865600.

The previous prime is 90207479. The next prime is 90207511. The reversal of 90207505 is 50570209.

It can be written as a sum of positive squares in 4 ways, for example, as 34152336 + 56055169 = 5844^2 + 7487^2 .

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

It is not a de Polignac number, because 90207505 - 2¹³ = 90199313 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36226 + ... + 38635.

It is an arithmetic number, because the mean of its divisors is an integer number (13587453).

Almost surely, 2^90207505 is an apocalyptic number.

It is an amenable number.

90207505 is a deficient number, since it is larger than the sum of its proper divisors (18492119).

90207505 is a wasteful number, since it uses less digits than its factorization.

90207505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75107.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 90207505 is about 9497.7631577125. The cubic root of 90207505 is about 448.4846228530.

The spelling of 90207505 in words is "ninety million, two hundred seven thousand, five hundred five".