1199684389 has 2 divisors, whose sum is σ = 1199684390. Its totient is φ = 1199684388.

The previous prime is 1199684351. The next prime is 1199684419. The reversal of 1199684389 is 9834869911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 624500100 + 575184289 = 24990^2 + 23983^2 .

It is a cyclic number.

It is not a de Polignac number, because 1199684389 - 2²⁵ = 1166129957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1199684989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599842194 + 599842195.

It is an arithmetic number, because the mean of its divisors is an integer number (599842195).

Almost surely, 2^1199684389 is an apocalyptic number.

It is an amenable number.

1199684389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1199684389 is an equidigital number, since it uses as much as digits as its factorization.

1199684389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 58.

The square root of 1199684389 is about 34636.4603994115. The cubic root of 1199684389 is about 1062.5653980323.

The spelling of 1199684389 in words is "one billion, one hundred ninety-nine million, six hundred eighty-four thousand, three hundred eighty-nine".