1394209 has 2 divisors, whose sum is σ = 1394210. Its totient is φ = 1394208.

The previous prime is 1394177. The next prime is 1394251. The reversal of 1394209 is 9024931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1149184 + 245025 = 1072^2 + 495^2 .

It is an emirp because it is prime and its reverse (9024931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1394209 - 2⁵ = 1394177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1394269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697104 + 697105.

It is an arithmetic number, because the mean of its divisors is an integer number (697105).

2^1394209 is an apocalyptic number.

It is an amenable number.

1394209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394209 is an equidigital number, since it uses as much as digits as its factorization.

1394209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1394209 is about 1180.7662766187. The cubic root of 1394209 is about 111.7144351456.

The spelling of 1394209 in words is "one million, three hundred ninety-four thousand, two hundred nine".