90236505 has 16 divisors (see below), whose sum is σ = 149036544. Its totient is φ = 46573440.

The previous prime is 90236501. The next prime is 90236519. The reversal of 90236505 is 50563209.

It is not a de Polignac number, because 90236505 - 2² = 90236501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90236501) 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 15 ways as a sum of consecutive naturals, for example, 96564 + ... + 97493.

It is an arithmetic number, because the mean of its divisors is an integer number (9314784).

Almost surely, 2^90236505 is an apocalyptic number.

It is an amenable number.

90236505 is a deficient number, since it is larger than the sum of its proper divisors (58800039).

90236505 is a wasteful number, since it uses less digits than its factorization.

90236505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194096.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 90236505 is about 9499.2897102889. The cubic root of 90236505 is about 448.5326774673.

The spelling of 90236505 in words is "ninety million, two hundred thirty-six thousand, five hundred five".