1238789 has 2 divisors, whose sum is σ = 1238790. Its totient is φ = 1238788.

The previous prime is 1238771. The next prime is 1238801. The reversal of 1238789 is 9878321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664225 + 574564 = 815^2 + 758^2 .

It is an emirp because it is prime and its reverse (9878321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1238789 - 2⁸ = 1238533 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1238719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619394 + 619395.

It is an arithmetic number, because the mean of its divisors is an integer number (619395).

2^1238789 is an apocalyptic number.

It is an amenable number.

1238789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238789 is an equidigital number, since it uses as much as digits as its factorization.

1238789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 1238789 is about 1113.0089846897. The cubic root of 1238789 is about 107.3987219926.

The spelling of 1238789 in words is "one million, two hundred thirty-eight thousand, seven hundred eighty-nine".