190220689 has 4 divisors (see below), whose sum is σ = 194860260. Its totient is φ = 185581120.

The previous prime is 190220677. The next prime is 190220713. The reversal of 190220689 is 986022091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986022091 = 283 ⋅3484177.

It can be written as a sum of positive squares in 2 ways, for example, as 84953089 + 105267600 = 9217^2 + 10260^2 .

It is a cyclic number.

It is not a de Polignac number, because 190220689 - 2¹¹ = 190218641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190220659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2319724 + ... + 2319805.

It is an arithmetic number, because the mean of its divisors is an integer number (48715065).

Almost surely, 2^190220689 is an apocalyptic number.

It is an amenable number.

190220689 is a deficient number, since it is larger than the sum of its proper divisors (4639571).

190220689 is an equidigital number, since it uses as much as digits as its factorization.

190220689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4639570.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 190220689 is about 13792.0516602861. The cubic root of 190220689 is about 575.1122039383.

The spelling of 190220689 in words is "one hundred ninety million, two hundred twenty thousand, six hundred eighty-nine".