90160009 has 4 divisors (see below), whose sum is σ = 92596804. Its totient is φ = 87723216.

The previous prime is 90159991. The next prime is 90160051. The reversal of 90160009 is 90006109.

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 87609600 + 2550409 = 9360^2 + 1597^2 .

It is a cyclic number.

It is not a de Polignac number, because 90160009 - 2¹⁷ = 90028937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90160099) 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, 1218342 + ... + 1218415.

It is an arithmetic number, because the mean of its divisors is an integer number (23149201).

Almost surely, 2^90160009 is an apocalyptic number.

It is an amenable number.

90160009 is a deficient number, since it is larger than the sum of its proper divisors (2436795).

90160009 is a wasteful number, since it uses less digits than its factorization.

90160009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436794.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 90160009 is about 9495.2624502959. The cubic root of 90160009 is about 448.4058970853.

The spelling of 90160009 in words is "ninety million, one hundred sixty thousand, nine".