91675000009 has 4 divisors (see below), whose sum is σ = 91675795860. Its totient is φ = 91674204160.

The previous prime is 91674999991. The next prime is 91675000049. The reversal of 91675000009 is 90000057619.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90000057619 = 3613 ⋅24910063.

It can be written as a sum of positive squares in 2 ways, for example, as 78626964025 + 13048035984 = 280405^2 + 114228^2 .

It is a cyclic number.

It is not a de Polignac number, because 91675000009 - 2¹¹ = 91674997961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91675000049) 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, 188344 + ... + 467785.

It is an arithmetic number, because the mean of its divisors is an integer number (22918948965).

Almost surely, 2^91675000009 is an apocalyptic number.

It is an amenable number.

91675000009 is a deficient number, since it is larger than the sum of its proper divisors (795851).

91675000009 is a wasteful number, since it uses less digits than its factorization.

91675000009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795850.

The product of its (nonzero) digits is 17010, while the sum is 37.

The spelling of 91675000009 in words is "ninety-one billion, six hundred seventy-five million, nine", and thus it is an aban number.