128745733 has 2 divisors, whose sum is σ = 128745734. Its totient is φ = 128745732.

The previous prime is 128745731. The next prime is 128745769. The reversal of 128745733 is 337547821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71622369 + 57123364 = 8463^2 + 7558^2 .

It is a cyclic number.

It is not a de Polignac number, because 128745733 - 2¹ = 128745731 is a prime.

Together with 128745731, 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 (128745731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64372866 + 64372867.

It is an arithmetic number, because the mean of its divisors is an integer number (64372867).

Almost surely, 2^128745733 is an apocalyptic number.

It is an amenable number.

128745733 is a deficient number, since it is larger than the sum of its proper divisors (1).

128745733 is an equidigital number, since it uses as much as digits as its factorization.

128745733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 128745733 is about 11346.6176898669. The cubic root of 128745733 is about 504.9452386458.

The spelling of 128745733 in words is "one hundred twenty-eight million, seven hundred forty-five thousand, seven hundred thirty-three".