128381503 has 2 divisors, whose sum is σ = 128381504. Its totient is φ = 128381502.

The previous prime is 128381497. The next prime is 128381549. The reversal of 128381503 is 305183821.

It is a weak prime.

It is an emirp because it is prime and its reverse (305183821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128381503 - 2⁵ = 128381471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128381563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64190751 + 64190752.

It is an arithmetic number, because the mean of its divisors is an integer number (64190752).

Almost surely, 2^128381503 is an apocalyptic number.

128381503 is a deficient number, since it is larger than the sum of its proper divisors (1).

128381503 is an equidigital number, since it uses as much as digits as its factorization.

128381503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 128381503 is about 11330.5561646373. The cubic root of 128381503 is about 504.4686146573.

It can be divided in two parts, 12838 and 1503, that added together give a palindrome (14341).

The spelling of 128381503 in words is "one hundred twenty-eight million, three hundred eighty-one thousand, five hundred three".