190045689 has 8 divisors (see below), whose sum is σ = 253461120. Its totient is φ = 126663696.

The previous prime is 190045679. The next prime is 190045697. The reversal of 190045689 is 986540091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 190045689 - 2⁴ = 190045673 is a prime.

It is a super-2 number, since 2×190045689² = 72234727814969442, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 190045689.

It is not an unprimeable number, because it can be changed into a prime (190045679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11967 + ... + 22875.

It is an arithmetic number, because the mean of its divisors is an integer number (31682640).

Almost surely, 2^190045689 is an apocalyptic number.

It is an amenable number.

190045689 is a deficient number, since it is larger than the sum of its proper divisors (63415431).

190045689 is a wasteful number, since it uses less digits than its factorization.

190045689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16719.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 190045689 is about 13785.7059666888. The cubic root of 190045689 is about 574.9357851414.

The spelling of 190045689 in words is "one hundred ninety million, forty-five thousand, six hundred eighty-nine".