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190193 = 892137
BaseRepresentation
bin101110011011110001
3100122220012
4232123301
522041233
64024305
71421333
oct563361
9318805
10190193
1111a993
1292095
1368753
144d453
153b548
hex2e6f1

190193 has 4 divisors (see below), whose sum is σ = 192420. Its totient is φ = 187968.

The previous prime is 190181. The next prime is 190207. The reversal of 190193 is 391091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 391091 = 1033797.

It can be written as a sum of positive squares in 2 ways, for example, as 20449 + 169744 = 143^2 + 412^2 .

It is not a de Polignac number, because 190193 - 26 = 190129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190093) 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, 980 + ... + 1157.

It is an arithmetic number, because the mean of its divisors is an integer number (48105).

2190193 is an apocalyptic number.

It is an amenable number.

190193 is a deficient number, since it is larger than the sum of its proper divisors (2227).

190193 is an equidigital number, since it uses as much as digits as its factorization.

190193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 190193 is about 436.1112243453. Note that the first 3 decimals coincide. The cubic root of 190193 is about 57.5084297660.

It can be divided in two parts, 190 and 193, that added together give a palindrome (383).

The spelling of 190193 in words is "one hundred ninety thousand, one hundred ninety-three".

Divisors: 1 89 2137 190193