1438536647 has 2 divisors, whose sum is σ = 1438536648. Its totient is φ = 1438536646.

The previous prime is 1438536629. The next prime is 1438536703. The reversal of 1438536647 is 7466358341.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1438536647 - 2²⁴ = 1421759431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1438536247) 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, 719268323 + 719268324.

It is an arithmetic number, because the mean of its divisors is an integer number (719268324).

Almost surely, 2^1438536647 is an apocalyptic number.

1438536647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438536647 is an equidigital number, since it uses as much as digits as its factorization.

1438536647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 47.

The square root of 1438536647 is about 37928.0456522611. The cubic root of 1438536647 is about 1128.8605861499.

The spelling of 1438536647 in words is "one billion, four hundred thirty-eight million, five hundred thirty-six thousand, six hundred forty-seven".