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190985 = 538197
BaseRepresentation
bin101110101000001001
3100200222112
4232220021
522102420
64032105
71423544
oct565011
9320875
10190985
11120543
1292635
1368c12
144d85b
153b8c5
hex2ea09

190985 has 4 divisors (see below), whose sum is σ = 229188. Its totient is φ = 152784.

The previous prime is 190979. The next prime is 190997. The reversal of 190985 is 589091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589091 = 896619.

It can be written as a sum of positive squares in 2 ways, for example, as 67081 + 123904 = 259^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 190985 - 26 = 190921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19094 + ... + 19103.

It is an arithmetic number, because the mean of its divisors is an integer number (57297).

2190985 is an apocalyptic number.

It is an amenable number.

190985 is a deficient number, since it is larger than the sum of its proper divisors (38203).

190985 is an equidigital number, since it uses as much as digits as its factorization.

190985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38202.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 190985 is about 437.0183062527. The cubic root of 190985 is about 57.5881445829.

The spelling of 190985 in words is "one hundred ninety thousand, nine hundred eighty-five".

Divisors: 1 5 38197 190985