1199669161 has 2 divisors, whose sum is σ = 1199669162. Its totient is φ = 1199669160.

The previous prime is 1199669137. The next prime is 1199669171. The reversal of 1199669161 is 1619669911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 649485225 + 550183936 = 25485^2 + 23456^2 .

It is an emirp because it is prime and its reverse (1619669911) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1916996611 and 1166996191.

It is a cyclic number.

It is not a de Polignac number, because 1199669161 - 2¹¹ = 1199667113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1199669171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599834580 + 599834581.

It is an arithmetic number, because the mean of its divisors is an integer number (599834581).

Almost surely, 2^1199669161 is an apocalyptic number.

It is an amenable number.

1199669161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1199669161 is an equidigital number, since it uses as much as digits as its factorization.

1199669161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 49.

The square root of 1199669161 is about 34636.2405725564. The cubic root of 1199669161 is about 1062.5609021792.

The spelling of 1199669161 in words is "one billion, one hundred ninety-nine million, six hundred sixty-nine thousand, one hundred sixty-one".