1389109 has 8 divisors (see below), whose sum is σ = 1477440. Its totient is φ = 1302336.

The previous prime is 1389107. The next prime is 1389133. The reversal of 1389109 is 9019831.

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

It is not a de Polignac number, because 1389109 - 2¹ = 1389107 is a prime.

1389109 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1824 + ... + 2470.

It is an arithmetic number, because the mean of its divisors is an integer number (184680).

2^1389109 is an apocalyptic number.

1389109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1389109 is a deficient number, since it is larger than the sum of its proper divisors (88331).

1389109 is a wasteful number, since it uses less digits than its factorization.

1389109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779.

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

The square root of 1389109 is about 1178.6046835135. The cubic root of 1389109 is about 111.5780520209.

The spelling of 1389109 in words is "one million, three hundred eighty-nine thousand, one hundred nine".