134378987 has 2 divisors, whose sum is σ = 134378988. Its totient is φ = 134378986.

The previous prime is 134378983. The next prime is 134379013. The reversal of 134378987 is 789873431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 134378987 - 2² = 134378983 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (134378983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67189493 + 67189494.

It is an arithmetic number, because the mean of its divisors is an integer number (67189494).

Almost surely, 2^134378987 is an apocalyptic number.

134378987 is a deficient number, since it is larger than the sum of its proper divisors (1).

134378987 is an equidigital number, since it uses as much as digits as its factorization.

134378987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 50.

The square root of 134378987 is about 11592.1950898007. The cubic root of 134378987 is about 512.2049693556.

The spelling of 134378987 in words is "one hundred thirty-four million, three hundred seventy-eight thousand, nine hundred eighty-seven".