1385443471 has 2 divisors, whose sum is σ = 1385443472. Its totient is φ = 1385443470.

The previous prime is 1385443469. The next prime is 1385443483. The reversal of 1385443471 is 1743445831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1385443471 - 2¹ = 1385443469 is a prime.

It is a super-3 number, since 3×1385443471³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 1385443469, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1385441471) 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, 692721735 + 692721736.

It is an arithmetic number, because the mean of its divisors is an integer number (692721736).

Almost surely, 2^1385443471 is an apocalyptic number.

1385443471 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385443471 is an equidigital number, since it uses as much as digits as its factorization.

1385443471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 40.

The square root of 1385443471 is about 37221.5457900394. The cubic root of 1385443471 is about 1114.7982290221.

The spelling of 1385443471 in words is "one billion, three hundred eighty-five million, four hundred forty-three thousand, four hundred seventy-one".