1186785313 has 4 divisors (see below), whose sum is σ = 1356326080. Its totient is φ = 1017244548.

The previous prime is 1186785311. The next prime is 1186785329. The reversal of 1186785313 is 3135876811.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3135876811 = 53 ⋅59167487.

It is a cyclic number.

It is not a de Polignac number, because 1186785313 - 2¹ = 1186785311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1186785313.

It is not an unprimeable number, because it can be changed into a prime (1186785311) 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, 84770373 + ... + 84770386.

It is an arithmetic number, because the mean of its divisors is an integer number (339081520).

Almost surely, 2^1186785313 is an apocalyptic number.

It is an amenable number.

1186785313 is a deficient number, since it is larger than the sum of its proper divisors (169540767).

1186785313 is an equidigital number, since it uses as much as digits as its factorization.

1186785313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169540766.

The product of its digits is 120960, while the sum is 43.

The square root of 1186785313 is about 34449.7505506208. The cubic root of 1186785313 is about 1058.7434121641.

The spelling of 1186785313 in words is "one billion, one hundred eighty-six million, seven hundred eighty-five thousand, three hundred thirteen".