131128507 has 2 divisors, whose sum is σ = 131128508. Its totient is φ = 131128506.

The previous prime is 131128489. The next prime is 131128541. The reversal of 131128507 is 705821131.

It is a weak prime.

It is an emirp because it is prime and its reverse (705821131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131128507 - 2⁷ = 131128379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131128597) 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, 65564253 + 65564254.

It is an arithmetic number, because the mean of its divisors is an integer number (65564254).

Almost surely, 2^131128507 is an apocalyptic number.

131128507 is a deficient number, since it is larger than the sum of its proper divisors (1).

131128507 is an equidigital number, since it uses as much as digits as its factorization.

131128507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 131128507 is about 11451.1356205400. The cubic root of 131128507 is about 508.0413235961.

Adding to 131128507 its reverse (705821131), we get a palindrome (836949638).

The spelling of 131128507 in words is "one hundred thirty-one million, one hundred twenty-eight thousand, five hundred seven".