1394047469 has 2 divisors, whose sum is σ = 1394047470. Its totient is φ = 1394047468.

The previous prime is 1394047387. The next prime is 1394047471. The reversal of 1394047469 is 9647404931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1194531844 + 199515625 = 34562^2 + 14125^2 .

It is an emirp because it is prime and its reverse (9647404931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1394047469 - 2²⁸ = 1125612013 is a prime.

It is a super-2 number, since 2×1394047469² = 3886736691650611922, which contains 22 as substring.

Together with 1394047471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1394047069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697023734 + 697023735.

It is an arithmetic number, because the mean of its divisors is an integer number (697023735).

Almost surely, 2^1394047469 is an apocalyptic number.

It is an amenable number.

1394047469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394047469 is an equidigital number, since it uses as much as digits as its factorization.

1394047469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 1394047469 is about 37336.9450946378. The cubic root of 1394047469 is about 1117.1012062236.

The spelling of 1394047469 in words is "one billion, three hundred ninety-four million, forty-seven thousand, four hundred sixty-nine".