1889147289 has 4 divisors (see below), whose sum is σ = 2518863056. Its totient is φ = 1259431524.

The previous prime is 1889147279. The next prime is 1889147291. The reversal of 1889147289 is 9827419881.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9827419881 = 3 ⋅3275806627.

It is not a de Polignac number, because 1889147289 - 2⁸ = 1889147033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1889147269) 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, 314857879 + ... + 314857884.

It is an arithmetic number, because the mean of its divisors is an integer number (629715764).

Almost surely, 2^1889147289 is an apocalyptic number.

It is an amenable number.

1889147289 is a deficient number, since it is larger than the sum of its proper divisors (629715767).

1889147289 is an equidigital number, since it uses as much as digits as its factorization.

1889147289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629715766.

The product of its digits is 2322432, while the sum is 57.

The square root of 1889147289 is about 43464.3220239313. The cubic root of 1889147289 is about 1236.1996220086.

The spelling of 1889147289 in words is "one billion, eight hundred eighty-nine million, one hundred forty-seven thousand, two hundred eighty-nine".