1169968161 has 4 divisors (see below), whose sum is σ = 1559957552. Its totient is φ = 779978772.

The previous prime is 1169968139. The next prime is 1169968193. The reversal of 1169968161 is 1618699611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1169968161 - 2¹¹ = 1169966113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1169968161.

It is not an unprimeable number, because it can be changed into a prime (1169968061) 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 in 3 ways as a sum of consecutive naturals, for example, 194994691 + ... + 194994696.

It is an arithmetic number, because the mean of its divisors is an integer number (389989388).

Almost surely, 2^1169968161 is an apocalyptic number.

It is an amenable number.

1169968161 is a deficient number, since it is larger than the sum of its proper divisors (389989391).

1169968161 is an equidigital number, since it uses as much as digits as its factorization.

1169968161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389989390.

The product of its digits is 139968, while the sum is 48.

The square root of 1169968161 is about 34204.7973389699. The cubic root of 1169968161 is about 1053.7186846371.

The spelling of 1169968161 in words is "one billion, one hundred sixty-nine million, nine hundred sixty-eight thousand, one hundred sixty-one".