9051985 has 4 divisors (see below), whose sum is σ = 10862388. Its totient is φ = 7241584.

The previous prime is 9051983. The next prime is 9051989. The reversal of 9051985 is 5891509.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1718721 + 7333264 = 1311^2 + 2708^2 .

It is a cyclic number.

It is not a de Polignac number, because 9051985 - 2¹ = 9051983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9051983) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 905194 + ... + 905203.

It is an arithmetic number, because the mean of its divisors is an integer number (2715597).

Almost surely, 2^9051985 is an apocalyptic number.

It is an amenable number.

9051985 is a deficient number, since it is larger than the sum of its proper divisors (1810403).

9051985 is a wasteful number, since it uses less digits than its factorization.

9051985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810402.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 9051985 is about 3008.6516913727. The cubic root of 9051985 is about 208.4081068485.

The spelling of 9051985 in words is "nine million, fifty-one thousand, nine hundred eighty-five".