1389569 has 2 divisors, whose sum is σ = 1389570. Its totient is φ = 1389568.

The previous prime is 1389559. The next prime is 1389587. The reversal of 1389569 is 9659831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 846400 + 543169 = 920^2 + 737^2 .

It is an emirp because it is prime and its reverse (9659831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1389569 - 2¹⁶ = 1324033 is a prime.

It is a super-2 number, since 2×1389569² = 3861804011522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1389539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694784 + 694785.

It is an arithmetic number, because the mean of its divisors is an integer number (694785).

2^1389569 is an apocalyptic number.

It is an amenable number.

1389569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389569 is an equidigital number, since it uses as much as digits as its factorization.

1389569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 1389569 is about 1178.7998133695. The cubic root of 1389569 is about 111.5903669267.

The spelling of 1389569 in words is "one million, three hundred eighty-nine thousand, five hundred sixty-nine".