128751743 has 2 divisors, whose sum is σ = 128751744. Its totient is φ = 128751742.

The previous prime is 128751731. The next prime is 128751803. The reversal of 128751743 is 347157821.

It is a weak prime.

It is an emirp because it is prime and its reverse (347157821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128751743 - 2¹⁴ = 128735359 is a prime.

It is a super-2 number, since 2×128751743² = 33154022651076098, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 128751697 and 128751706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128751043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64375871 + 64375872.

It is an arithmetic number, because the mean of its divisors is an integer number (64375872).

Almost surely, 2^128751743 is an apocalyptic number.

128751743 is a deficient number, since it is larger than the sum of its proper divisors (1).

128751743 is an equidigital number, since it uses as much as digits as its factorization.

128751743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 38.

The square root of 128751743 is about 11346.8825234070. The cubic root of 128751743 is about 504.9530956665.

The spelling of 128751743 in words is "one hundred twenty-eight million, seven hundred fifty-one thousand, seven hundred forty-three".