1389587 has 2 divisors, whose sum is σ = 1389588. Its totient is φ = 1389586.

The previous prime is 1389569. The next prime is 1389589. The reversal of 1389587 is 7859831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1389587 - 2¹⁶ = 1324051 is a prime.

Together with 1389589, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1389589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694793 + 694794.

It is an arithmetic number, because the mean of its divisors is an integer number (694794).

2^1389587 is an apocalyptic number.

1389587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389587 is an equidigital number, since it uses as much as digits as its factorization.

1389587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The square root of 1389587 is about 1178.8074482289. The cubic root of 1389587 is about 111.5908487591.

The spelling of 1389587 in words is "one million, three hundred eighty-nine thousand, five hundred eighty-seven".