1191530713 has 4 divisors (see below), whose sum is σ = 1192377780. Its totient is φ = 1190683648.

The previous prime is 1191530689. The next prime is 1191530719. The reversal of 1191530713 is 3170351911.

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

It can be written as a sum of positive squares in 2 ways, for example, as 425514384 + 766016329 = 20628^2 + 27677^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1191530713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1191530719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421420 + ... + 424237.

It is an arithmetic number, because the mean of its divisors is an integer number (298094445).

Almost surely, 2^1191530713 is an apocalyptic number.

It is an amenable number.

1191530713 is a deficient number, since it is larger than the sum of its proper divisors (847067).

1191530713 is an equidigital number, since it uses as much as digits as its factorization.

1191530713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847066.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 1191530713 is about 34518.5560677152. The cubic root of 1191530713 is about 1060.1526755877.

The spelling of 1191530713 in words is "one billion, one hundred ninety-one million, five hundred thirty thousand, seven hundred thirteen".