1165747423 has 4 divisors (see below), whose sum is σ = 1205945640. Its totient is φ = 1125549208.

The previous prime is 1165747397. The next prime is 1165747447. The reversal of 1165747423 is 3247475611.

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 1165747423 - 2⁵ = 1165747391 is a prime.

It is a super-2 number, since 2×1165747423² = 2717934108462281858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165747523) 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, 20099065 + ... + 20099122.

It is an arithmetic number, because the mean of its divisors is an integer number (301486410).

Almost surely, 2^1165747423 is an apocalyptic number.

1165747423 is a deficient number, since it is larger than the sum of its proper divisors (40198217).

1165747423 is an equidigital number, since it uses as much as digits as its factorization.

1165747423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40198216.

The product of its digits is 141120, while the sum is 40.

The square root of 1165747423 is about 34143.0435520913. The cubic root of 1165747423 is about 1052.4500377432.

The spelling of 1165747423 in words is "one billion, one hundred sixty-five million, seven hundred forty-seven thousand, four hundred twenty-three".