1389819 has 8 divisors (see below), whose sum is σ = 1888272. Its totient is φ = 908960.

The previous prime is 1389811. The next prime is 1389833. The reversal of 1389819 is 9189831.

1389819 = T₂₀₂ + T₂₀₃ + ... + T₂₅₄.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1389819 - 2³ = 1389811 is a prime.

It is a super-2 number, since 2×1389819² = 3863193705522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1389811) 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, 4212 + ... + 4529.

It is an arithmetic number, because the mean of its divisors is an integer number (236034).

2^1389819 is an apocalyptic number.

1389819 is a deficient number, since it is larger than the sum of its proper divisors (498453).

1389819 is an equidigital number, since it uses as much as digits as its factorization.

1389819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8797.

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

The square root of 1389819 is about 1178.9058486580. The cubic root of 1389819 is about 111.5970586704.

The spelling of 1389819 in words is "one million, three hundred eighty-nine thousand, eight hundred nineteen".