185379813 has 8 divisors (see below), whose sum is σ = 274636800. Its totient is φ = 123586524.

The previous prime is 185379773. The next prime is 185379841. The reversal of 185379813 is 318973581.

185379813 is a `hidden beast` number, since 18 + 537 + 98 + 13 = 666.

It is not a de Polignac number, because 185379813 - 2⁶ = 185379749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185379863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3432933 + ... + 3432986.

It is an arithmetic number, because the mean of its divisors is an integer number (34329600).

Almost surely, 2^185379813 is an apocalyptic number.

It is an amenable number.

185379813 is a deficient number, since it is larger than the sum of its proper divisors (89256987).

185379813 is an equidigital number, since it uses as much as digits as its factorization.

185379813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6865928 (or 6865922 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 185379813 is about 13615.4255533935. The cubic root of 185379813 is about 570.1915976397.

The spelling of 185379813 in words is "one hundred eighty-five million, three hundred seventy-nine thousand, eight hundred thirteen".