90586009 has 2 divisors, whose sum is σ = 90586010. Its totient is φ = 90586008.

The previous prime is 90586007. The next prime is 90586031. The reversal of 90586009 is 90068509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82446400 + 8139609 = 9080^2 + 2853^2 .

It is an emirp because it is prime and its reverse (90068509) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90586009 - 2¹ = 90586007 is a prime.

Together with 90586007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (90586007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45293004 + 45293005.

It is an arithmetic number, because the mean of its divisors is an integer number (45293005).

Almost surely, 2^90586009 is an apocalyptic number.

It is an amenable number.

90586009 is a deficient number, since it is larger than the sum of its proper divisors (1).

90586009 is an equidigital number, since it uses as much as digits as its factorization.

90586009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 90586009 is about 9517.6682543573. The cubic root of 90586009 is about 449.1110169711. Note that the first 3 decimals are identical.

The spelling of 90586009 in words is "ninety million, five hundred eighty-six thousand, nine".