1389611 has 4 divisors (see below), whose sum is σ = 1392792. Its totient is φ = 1386432.

The previous prime is 1389589. The next prime is 1389623. The reversal of 1389611 is 1169831.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1389611 - 2⁶ = 1389547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389211) 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, 806 + ... + 1851.

It is an arithmetic number, because the mean of its divisors is an integer number (348198).

2^1389611 is an apocalyptic number.

1389611 is a deficient number, since it is larger than the sum of its proper divisors (3181).

1389611 is an equidigital number, since it uses as much as digits as its factorization.

1389611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180.

The product of its digits is 1296, while the sum is 29.

The square root of 1389611 is about 1178.8176279646. The cubic root of 1389611 is about 111.5914911958.

The spelling of 1389611 in words is "one million, three hundred eighty-nine thousand, six hundred eleven".