1394389 has 2 divisors, whose sum is σ = 1394390. Its totient is φ = 1394388.

The previous prime is 1394383. The next prime is 1394401. The reversal of 1394389 is 9834931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1199025 + 195364 = 1095^2 + 442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1394389 is a prime.

1394389 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1394383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697194 + 697195.

It is an arithmetic number, because the mean of its divisors is an integer number (697195).

2^1394389 is an apocalyptic number.

It is an amenable number.

1394389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394389 is an equidigital number, since it uses as much as digits as its factorization.

1394389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 1394389 is about 1180.8424958478. The cubic root of 1394389 is about 111.7192425867.

The spelling of 1394389 in words is "one million, three hundred ninety-four thousand, three hundred eighty-nine".