128860387 has 2 divisors, whose sum is σ = 128860388. Its totient is φ = 128860386.

The previous prime is 128860351. The next prime is 128860393. The reversal of 128860387 is 783068821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128860387 is a prime.

It is not a weakly prime, because it can be changed into another prime (128810387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64430193 + 64430194.

It is an arithmetic number, because the mean of its divisors is an integer number (64430194).

Almost surely, 2^128860387 is an apocalyptic number.

128860387 is a deficient number, since it is larger than the sum of its proper divisors (1).

128860387 is an equidigital number, since it uses as much as digits as its factorization.

128860387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 128860387 is about 11351.6689081386. The cubic root of 128860387 is about 505.0950864966.

The spelling of 128860387 in words is "one hundred twenty-eight million, eight hundred sixty thousand, three hundred eighty-seven".