1290800647 has 2 divisors, whose sum is σ = 1290800648. Its totient is φ = 1290800646.

The previous prime is 1290800603. The next prime is 1290800657. The reversal of 1290800647 is 7460080921.

It is a strong prime.

It is an emirp because it is prime and its reverse (7460080921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1290800647 - 2¹¹ = 1290798599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290800657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645400323 + 645400324.

It is an arithmetic number, because the mean of its divisors is an integer number (645400324).

Almost surely, 2^1290800647 is an apocalyptic number.

1290800647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290800647 is an equidigital number, since it uses as much as digits as its factorization.

1290800647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1290800647 is about 35927.7141911366. The cubic root of 1290800647 is about 1088.8123998221.

The spelling of 1290800647 in words is "one billion, two hundred ninety million, eight hundred thousand, six hundred forty-seven".