1930189 has 4 divisors (see below), whose sum is σ = 1937340. Its totient is φ = 1923040.

The previous prime is 1930177. The next prime is 1930199. The reversal of 1930189 is 9810391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9810391 = 2473 ⋅3967.

It can be written as a sum of positive squares in 2 ways, for example, as 514089 + 1416100 = 717^2 + 1190^2 .

It is a cyclic number.

It is not a de Polignac number, because 1930189 - 2¹¹ = 1928141 is a prime.

It is an Ulam number.

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 1930189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1930139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3154 + ... + 3715.

It is an arithmetic number, because the mean of its divisors is an integer number (484335).

2^1930189 is an apocalyptic number.

It is an amenable number.

1930189 is a deficient number, since it is larger than the sum of its proper divisors (7151).

1930189 is an equidigital number, since it uses as much as digits as its factorization.

1930189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7150.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1930189 is about 1389.3124198682. The cubic root of 1930189 is about 124.5087707460.

The spelling of 1930189 in words is "one million, nine hundred thirty thousand, one hundred eighty-nine".