190001005 has 4 divisors (see below), whose sum is σ = 228001212. Its totient is φ = 152000800.

The previous prime is 190000991. The next prime is 190001023. The reversal of 190001005 is 500100091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34175716 + 155825289 = 5846^2 + 12483^2 .

It is not a de Polignac number, because 190001005 - 2¹³ = 189992813 is a prime.

It is a super-2 number, since 2×190001005² = 72200763802020050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 190001005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19000096 + ... + 19000105.

It is an arithmetic number, because the mean of its divisors is an integer number (57000303).

Almost surely, 2^190001005 is an apocalyptic number.

It is an amenable number.

190001005 is a deficient number, since it is larger than the sum of its proper divisors (38000207).

190001005 is an equidigital number, since it uses as much as digits as its factorization.

190001005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38000206.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 190001005 is about 13784.0852072236. The cubic root of 190001005 is about 574.8907215140.

Adding to 190001005 its reverse (500100091), we get a palindrome (690101096).

The spelling of 190001005 in words is "one hundred ninety million, one thousand, five".