188349813 has 8 divisors (see below), whose sum is σ = 279036800. Its totient is φ = 125566524.

The previous prime is 188349803. The next prime is 188349823. The reversal of 188349813 is 318943881.

It is an interprime number because it is at equal distance from previous prime (188349803) and next prime (188349823).

It is not a de Polignac number, because 188349813 - 2¹⁰ = 188348789 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 (188349803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3487933 + ... + 3487986.

It is an arithmetic number, because the mean of its divisors is an integer number (34879600).

Almost surely, 2^188349813 is an apocalyptic number.

It is an amenable number.

188349813 is a deficient number, since it is larger than the sum of its proper divisors (90686987).

188349813 is an equidigital number, since it uses as much as digits as its factorization.

188349813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6975928 (or 6975922 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 188349813 is about 13724.0596399170. The cubic root of 188349813 is about 573.2205231070.

The spelling of 188349813 in words is "one hundred eighty-eight million, three hundred forty-nine thousand, eight hundred thirteen".