1165662959 has 4 divisors (see below), whose sum is σ = 1171187640. Its totient is φ = 1160138280.

The previous prime is 1165662943. The next prime is 1165662983. The reversal of 1165662959 is 9592665611.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1165662959 - 2⁴ = 1165662943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165665959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2762024 + ... + 2762445.

It is an arithmetic number, because the mean of its divisors is an integer number (292796910).

Almost surely, 2^1165662959 is an apocalyptic number.

1165662959 is a deficient number, since it is larger than the sum of its proper divisors (5524681).

1165662959 is an equidigital number, since it uses as much as digits as its factorization.

1165662959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5524680.

The product of its digits is 874800, while the sum is 50.

The square root of 1165662959 is about 34141.8066159364. The cubic root of 1165662959 is about 1052.4246187759.

The spelling of 1165662959 in words is "one billion, one hundred sixty-five million, six hundred sixty-two thousand, nine hundred fifty-nine".