128137903 has 2 divisors, whose sum is σ = 128137904. Its totient is φ = 128137902.

The previous prime is 128137901. The next prime is 128137907. The reversal of 128137903 is 309731821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128137903 - 2¹ = 128137901 is a prime.

Together with 128137901, 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 (128137901) 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, 64068951 + 64068952.

It is an arithmetic number, because the mean of its divisors is an integer number (64068952).

Almost surely, 2^128137903 is an apocalyptic number.

128137903 is a deficient number, since it is larger than the sum of its proper divisors (1).

128137903 is an equidigital number, since it uses as much as digits as its factorization.

128137903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 128137903 is about 11319.8013675152. The cubic root of 128137903 is about 504.1493413470.

The spelling of 128137903 in words is "one hundred twenty-eight million, one hundred thirty-seven thousand, nine hundred three".