1198009321 has 2 divisors, whose sum is σ = 1198009322. Its totient is φ = 1198009320.

The previous prime is 1198009289. The next prime is 1198009333. The reversal of 1198009321 is 1239008911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 780420096 + 417589225 = 27936^2 + 20435^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198009321 - 2⁵ = 1198009289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1198009361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599004660 + 599004661.

It is an arithmetic number, because the mean of its divisors is an integer number (599004661).

Almost surely, 2^1198009321 is an apocalyptic number.

It is an amenable number.

1198009321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198009321 is an equidigital number, since it uses as much as digits as its factorization.

1198009321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1198009321 is about 34612.2712487927. The cubic root of 1198009321 is about 1062.0706294801.

The spelling of 1198009321 in words is "one billion, one hundred ninety-eight million, nine thousand, three hundred twenty-one".