128131967 has 2 divisors, whose sum is σ = 128131968. Its totient is φ = 128131966.

The previous prime is 128131961. The next prime is 128131973. The reversal of 128131967 is 769131821.

It is a balanced prime because it is at equal distance from previous prime (128131961) and next prime (128131973).

It is an emirp because it is prime and its reverse (769131821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128131967 - 2¹⁰ = 128130943 is a prime.

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 128131967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128131961) 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, 64065983 + 64065984.

It is an arithmetic number, because the mean of its divisors is an integer number (64065984).

Almost surely, 2^128131967 is an apocalyptic number.

128131967 is a deficient number, since it is larger than the sum of its proper divisors (1).

128131967 is an equidigital number, since it uses as much as digits as its factorization.

128131967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 38.

The square root of 128131967 is about 11319.5391690651. The cubic root of 128131967 is about 504.1415563054.

The spelling of 128131967 in words is "one hundred twenty-eight million, one hundred thirty-one thousand, nine hundred sixty-seven".