9099121 has 2 divisors, whose sum is σ = 9099122. Its totient is φ = 9099120.

The previous prime is 9099113. The next prime is 9099133. The reversal of 9099121 is 1219909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7096896 + 2002225 = 2664^2 + 1415^2 .

It is an emirp because it is prime and its reverse (1219909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9099121 - 2³ = 9099113 is a prime.

9099121 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9099161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4549560 + 4549561.

It is an arithmetic number, because the mean of its divisors is an integer number (4549561).

Almost surely, 2^9099121 is an apocalyptic number.

It is an amenable number.

9099121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9099121 is an equidigital number, since it uses as much as digits as its factorization.

9099121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 9099121 is about 3016.4749294499. The cubic root of 9099121 is about 208.7692255232.

The spelling of 9099121 in words is "nine million, ninety-nine thousand, one hundred twenty-one".