90009745 has 16 divisors (see below), whose sum is σ = 129939840. Its totient is φ = 58472064.

The previous prime is 90009739. The next prime is 90009757. The reversal of 90009745 is 54790009.

It is not a de Polignac number, because 90009745 - 2⁹ = 90009233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90009745.

It is an unprimeable number.

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, 67012 + ... + 68341.

It is an arithmetic number, because the mean of its divisors is an integer number (8121240).

Almost surely, 2^90009745 is an apocalyptic number.

90009745 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

90009745 is a deficient number, since it is larger than the sum of its proper divisors (39930095).

90009745 is a wasteful number, since it uses less digits than its factorization.

90009745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135384.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 90009745 is about 9487.3465731995. The cubic root of 90009745 is about 448.1566486235.

The spelling of 90009745 in words is "ninety million, nine thousand, seven hundred forty-five".