190005889 has 4 divisors (see below), whose sum is σ = 201182724. Its totient is φ = 178829056.

The previous prime is 190005887. The next prime is 190005943. The reversal of 190005889 is 988500091.

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 105678400 + 84327489 = 10280^2 + 9183^2 .

It is a cyclic number.

It is not a de Polignac number, because 190005889 - 2¹ = 190005887 is a prime.

It is a super-2 number, since 2×190005889² = 72204475709360642, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190005887) 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, 5588392 + ... + 5588425.

It is an arithmetic number, because the mean of its divisors is an integer number (50295681).

Almost surely, 2^190005889 is an apocalyptic number.

It is an amenable number.

190005889 is a deficient number, since it is larger than the sum of its proper divisors (11176835).

190005889 is a wasteful number, since it uses less digits than its factorization.

190005889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11176834.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 190005889 is about 13784.2623669168. The cubic root of 190005889 is about 574.8956473515.

The spelling of 190005889 in words is "one hundred ninety million, five thousand, eight hundred eighty-nine".