1165263117 has 4 divisors (see below), whose sum is σ = 1553684160. Its totient is φ = 776842076.

The previous prime is 1165263107. The next prime is 1165263131. The reversal of 1165263117 is 7113625611.

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 a cyclic number.

It is not a de Polignac number, because 1165263117 - 2⁴ = 1165263101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165263107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194210517 + ... + 194210522.

It is an arithmetic number, because the mean of its divisors is an integer number (388421040).

Almost surely, 2^1165263117 is an apocalyptic number.

It is an amenable number.

1165263117 is a deficient number, since it is larger than the sum of its proper divisors (388421043).

1165263117 is an equidigital number, since it uses as much as digits as its factorization.

1165263117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388421042.

The product of its digits is 7560, while the sum is 33.

The square root of 1165263117 is about 34135.9505067605. The cubic root of 1165263117 is about 1052.3042718996.

Adding to 1165263117 its reverse (7113625611), we get a palindrome (8278888728).

The spelling of 1165263117 in words is "one billion, one hundred sixty-five million, two hundred sixty-three thousand, one hundred seventeen".