1428971447 has 2 divisors, whose sum is σ = 1428971448. Its totient is φ = 1428971446.

The previous prime is 1428971441. The next prime is 1428971461. The reversal of 1428971447 is 7441798241.

It is a weak prime.

It is an emirp because it is prime and its reverse (7441798241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1428971447 - 2¹⁰ = 1428970423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428971441) 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, 714485723 + 714485724.

It is an arithmetic number, because the mean of its divisors is an integer number (714485724).

Almost surely, 2^1428971447 is an apocalyptic number.

1428971447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428971447 is an equidigital number, since it uses as much as digits as its factorization.

1428971447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 47.

The square root of 1428971447 is about 37801.7386769445. The cubic root of 1428971447 is about 1126.3529919451.

The spelling of 1428971447 in words is "one billion, four hundred twenty-eight million, nine hundred seventy-one thousand, four hundred forty-seven".