134687389987 has 2 divisors, whose sum is σ = 134687389988. Its totient is φ = 134687389986.

The previous prime is 134687389951. The next prime is 134687389997. The reversal of 134687389987 is 789983786431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134687389987 is a prime.

It is not a weakly prime, because it can be changed into another prime (134687389927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67343694993 + 67343694994.

It is an arithmetic number, because the mean of its divisors is an integer number (67343694994).

Almost surely, 2^134687389987 is an apocalyptic number.

134687389987 is a deficient number, since it is larger than the sum of its proper divisors (1).

134687389987 is an equidigital number, since it uses as much as digits as its factorization.

134687389987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 438939648, while the sum is 73.

The spelling of 134687389987 in words is "one hundred thirty-four billion, six hundred eighty-seven million, three hundred eighty-nine thousand, nine hundred eighty-seven".