1889473389 has 4 divisors (see below), whose sum is σ = 2519297856. Its totient is φ = 1259648924.

The previous prime is 1889473387. The next prime is 1889473403. The reversal of 1889473389 is 9833749881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1889473389 - 2¹ = 1889473387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889473387) by changing a digit.

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, 314912229 + ... + 314912234.

It is an arithmetic number, because the mean of its divisors is an integer number (629824464).

Almost surely, 2^1889473389 is an apocalyptic number.

It is an amenable number.

1889473389 is a deficient number, since it is larger than the sum of its proper divisors (629824467).

1889473389 is an equidigital number, since it uses as much as digits as its factorization.

1889473389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629824466.

The product of its digits is 10450944, while the sum is 60.

The square root of 1889473389 is about 43468.0732147170. The cubic root of 1889473389 is about 1236.2707478380.

The spelling of 1889473389 in words is "one billion, eight hundred eighty-nine million, four hundred seventy-three thousand, three hundred eighty-nine".