1889139 has 8 divisors (see below), whose sum is σ = 2878720. Its totient is φ = 1079496.

The previous prime is 1889131. The next prime is 1889143. The reversal of 1889139 is 9319881.

It is a happy number.

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

It is not a de Polignac number, because 1889139 - 2³ = 1889131 is a prime.

It is a super-2 number, since 2×1889139² = 7137692322642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1889097 and 1889106.

It is not an unprimeable number, because it can be changed into a prime (1889131) 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 7 ways as a sum of consecutive naturals, for example, 44959 + ... + 45000.

It is an arithmetic number, because the mean of its divisors is an integer number (359840).

2^1889139 is an apocalyptic number.

1889139 is a deficient number, since it is larger than the sum of its proper divisors (989581).

1889139 is an equidigital number, since it uses as much as digits as its factorization.

1889139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89969.

The product of its digits is 15552, while the sum is 39.

The square root of 1889139 is about 1374.4595301427. The cubic root of 1889139 is about 123.6197813984.

The spelling of 1889139 in words is "one million, eight hundred eighty-nine thousand, one hundred thirty-nine".