128743471 has 2 divisors, whose sum is σ = 128743472. Its totient is φ = 128743470.

The previous prime is 128743463. The next prime is 128743493. The reversal of 128743471 is 174347821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128743471 - 2³ = 128743463 is a prime.

It is a super-3 number, since 3×128743471³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128743471.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128743271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64371735 + 64371736.

It is an arithmetic number, because the mean of its divisors is an integer number (64371736).

Almost surely, 2^128743471 is an apocalyptic number.

128743471 is a deficient number, since it is larger than the sum of its proper divisors (1).

128743471 is an equidigital number, since it uses as much as digits as its factorization.

128743471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 37.

The square root of 128743471 is about 11346.5180121480. The cubic root of 128743471 is about 504.9422814143.

The spelling of 128743471 in words is "one hundred twenty-eight million, seven hundred forty-three thousand, four hundred seventy-one".