1389019 has 4 divisors (see below), whose sum is σ = 1470744. Its totient is φ = 1307296.

The previous prime is 1389007. The next prime is 1389083. The reversal of 1389019 is 9109831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1389019 is a prime.

It is a super-2 number, since 2×1389019² = 3858747564722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389319) 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, 40837 + ... + 40870.

It is an arithmetic number, because the mean of its divisors is an integer number (367686).

2^1389019 is an apocalyptic number.

1389019 is a deficient number, since it is larger than the sum of its proper divisors (81725).

1389019 is an equidigital number, since it uses as much as digits as its factorization.

1389019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81724.

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

The square root of 1389019 is about 1178.5665021542. The cubic root of 1389019 is about 111.5756422648.

The spelling of 1389019 in words is "one million, three hundred eighty-nine thousand, nineteen".