128045387 has 2 divisors, whose sum is σ = 128045388. Its totient is φ = 128045386.

The previous prime is 128045381. The next prime is 128045441. The reversal of 128045387 is 783540821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128045387 - 2²⁰ = 126996811 is a prime.

It is a super-2 number, since 2×128045387² = 32791242263959538, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128045387.

It is not a weakly prime, because it can be changed into another prime (128045381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64022693 + 64022694.

It is an arithmetic number, because the mean of its divisors is an integer number (64022694).

Almost surely, 2^128045387 is an apocalyptic number.

128045387 is a deficient number, since it is larger than the sum of its proper divisors (1).

128045387 is an equidigital number, since it uses as much as digits as its factorization.

128045387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 128045387 is about 11315.7141621729. The cubic root of 128045387 is about 504.0279796237.

The spelling of 128045387 in words is "one hundred twenty-eight million, forty-five thousand, three hundred eighty-seven".