1189345613 has 4 divisors (see below), whose sum is σ = 1189556028. Its totient is φ = 1189135200.

The previous prime is 1189345561. The next prime is 1189345667. The reversal of 1189345613 is 3165439811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3165439811 = 4493 ⋅704527.

It can be written as a sum of positive squares in 2 ways, for example, as 842566729 + 346778884 = 29027^2 + 18622^2 .

It is a cyclic number.

It is not a de Polignac number, because 1189345613 - 2²² = 1185151309 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 (1189345673) 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, 96488 + ... + 108113.

It is an arithmetic number, because the mean of its divisors is an integer number (297389007).

Almost surely, 2^1189345613 is an apocalyptic number.

It is an amenable number.

1189345613 is a deficient number, since it is larger than the sum of its proper divisors (210415).

1189345613 is an equidigital number, since it uses as much as digits as its factorization.

1189345613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210414.

The product of its digits is 77760, while the sum is 41.

The square root of 1189345613 is about 34486.8904513005. The cubic root of 1189345613 is about 1059.5042219921.

The spelling of 1189345613 in words is "one billion, one hundred eighty-nine million, three hundred forty-five thousand, six hundred thirteen".