1161947165 has 8 divisors (see below), whose sum is σ = 1415148000. Its totient is φ = 915683472.

The previous prime is 1161947159. The next prime is 1161947179. The reversal of 1161947165 is 5617491611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1161947165 - 2⁸ = 1161946909 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1733915 + ... + 1734584.

It is an arithmetic number, because the mean of its divisors is an integer number (176893500).

Almost surely, 2^1161947165 is an apocalyptic number.

It is an amenable number.

1161947165 is a deficient number, since it is larger than the sum of its proper divisors (253200835).

1161947165 is an equidigital number, since it uses as much as digits as its factorization.

1161947165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468571.

The product of its digits is 45360, while the sum is 41.

The square root of 1161947165 is about 34087.3461125973. The cubic root of 1161947165 is about 1051.3051540383.

The spelling of 1161947165 in words is "one billion, one hundred sixty-one million, nine hundred forty-seven thousand, one hundred sixty-five".