1165323609 has 12 divisors (see below), whose sum is σ = 1690291200. Its totient is φ = 773630424.

The previous prime is 1165323527. The next prime is 1165323611. The reversal of 1165323609 is 9063235611.

1165323609 is a `hidden beast` number, since 1 + 16 + 5 + 32 + 3 + 609 = 666.

It is not a de Polignac number, because 1165323609 - 2⁸ = 1165323353 is a prime.

It is a super-2 number, since 2×1165323609² = 2715958227385569762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1165323619) 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 in 11 ways as a sum of consecutive naturals, for example, 268729 + ... + 273030.

It is an arithmetic number, because the mean of its divisors is an integer number (140857600).

Almost surely, 2^1165323609 is an apocalyptic number.

It is an amenable number.

1165323609 is a deficient number, since it is larger than the sum of its proper divisors (524967591).

1165323609 is a wasteful number, since it uses less digits than its factorization.

1165323609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542004 (or 542001 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 1165323609 is about 34136.8365406052. The cubic root of 1165323609 is about 1052.3224809168.

The spelling of 1165323609 in words is "one billion, one hundred sixty-five million, three hundred twenty-three thousand, six hundred nine".