1394009 has 2 divisors, whose sum is σ = 1394010. Its totient is φ = 1394008.

The previous prime is 1393999. The next prime is 1394021. The reversal of 1394009 is 9004931.

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., 1315609 + 78400 = 1147^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1394009 - 2¹⁶ = 1328473 is a prime.

It is a super-2 number, since 2×1394009² = 3886522184162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1394089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697004 + 697005.

It is an arithmetic number, because the mean of its divisors is an integer number (697005).

2^1394009 is an apocalyptic number.

It is an amenable number.

1394009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394009 is an equidigital number, since it uses as much as digits as its factorization.

1394009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1394009 is about 1180.6815828156. The cubic root of 1394009 is about 111.7090930590.

The spelling of 1394009 in words is "one million, three hundred ninety-four thousand, nine".