1180395813 has 16 divisors (see below), whose sum is σ = 1593702656. Its totient is φ = 777047040.

The previous prime is 1180395779. The next prime is 1180395817. The reversal of 1180395813 is 3185930811.

It is not a de Polignac number, because 1180395813 - 2²⁶ = 1113286949 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 (1180395817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130353 + ... + 139113.

It is an arithmetic number, because the mean of its divisors is an integer number (99606416).

Almost surely, 2^1180395813 is an apocalyptic number.

It is an amenable number.

1180395813 is a deficient number, since it is larger than the sum of its proper divisors (413306843).

1180395813 is an equidigital number, since it uses as much as digits as its factorization.

1180395813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9324.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 1180395813 is about 34356.8888725391. Note that the first 4 decimals coincide. The cubic root of 1180395813 is about 1056.8399457869.

The spelling of 1180395813 in words is "one billion, one hundred eighty million, three hundred ninety-five thousand, eight hundred thirteen".