134131687 has 2 divisors, whose sum is σ = 134131688. Its totient is φ = 134131686.

The previous prime is 134131667. The next prime is 134131747. The reversal of 134131687 is 786131431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 134131687 - 2¹⁹ = 133607399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134131667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67065843 + 67065844.

It is an arithmetic number, because the mean of its divisors is an integer number (67065844).

Almost surely, 2^134131687 is an apocalyptic number.

134131687 is a deficient number, since it is larger than the sum of its proper divisors (1).

134131687 is an equidigital number, since it uses as much as digits as its factorization.

134131687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 134131687 is about 11581.5235180869. The cubic root of 134131687 is about 511.8905698239.

The spelling of 134131687 in words is "one hundred thirty-four million, one hundred thirty-one thousand, six hundred eighty-seven".