190813 has 4 divisors (see below), whose sum is σ = 218080. Its totient is φ = 163548.

The previous prime is 190811. The next prime is 190823. The reversal of 190813 is 318091.

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.

It is not a de Polignac number, because 190813 - 2¹ = 190811 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 (190811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13623 + ... + 13636.

It is an arithmetic number, because the mean of its divisors is an integer number (54520).

2¹⁹⁰⁸¹³ is an apocalyptic number.

It is an amenable number.

190813 is a deficient number, since it is larger than the sum of its proper divisors (27267).

190813 is an equidigital number, since it uses as much as digits as its factorization.

190813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27266.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 190813 is about 436.8214738311. The cubic root of 190813 is about 57.5708515392.

The spelling of 190813 in words is "one hundred ninety thousand, eight hundred thirteen".