9091609 has 2 divisors, whose sum is σ = 9091610. Its totient is φ = 9091608.

The previous prime is 9091597. The next prime is 9091613. The reversal of 9091609 is 9061909.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7209225 + 1882384 = 2685^2 + 1372^2 .

It is a cyclic number.

It is not a de Polignac number, because 9091609 - 2²¹ = 6994457 is a prime.

It is not a weakly prime, because it can be changed into another prime (9091679) 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 as a sum of consecutive naturals, namely, 4545804 + 4545805.

It is an arithmetic number, because the mean of its divisors is an integer number (4545805).

Almost surely, 2^9091609 is an apocalyptic number.

It is an amenable number.

9091609 is a deficient number, since it is larger than the sum of its proper divisors (1).

9091609 is an equidigital number, since it uses as much as digits as its factorization.

9091609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 9091609 is about 3015.2295103358. The cubic root of 9091609 is about 208.7117582068.

The spelling of 9091609 in words is "nine million, ninety-one thousand, six hundred nine".