134642687 has 4 divisors (see below), whose sum is σ = 135281016. Its totient is φ = 134004360.

The previous prime is 134642659. The next prime is 134642707. The reversal of 134642687 is 786246431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786246431 = 353 ⋅2227327.

It is a cyclic number.

It is not a de Polignac number, because 134642687 - 2¹² = 134638591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134642657) 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 in 3 ways as a sum of consecutive naturals, for example, 318848 + ... + 319269.

It is an arithmetic number, because the mean of its divisors is an integer number (33820254).

Almost surely, 2^134642687 is an apocalyptic number.

134642687 is a deficient number, since it is larger than the sum of its proper divisors (638329).

134642687 is an equidigital number, since it uses as much as digits as its factorization.

134642687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638328.

The product of its digits is 193536, while the sum is 41.

The square root of 134642687 is about 11603.5635474625. The cubic root of 134642687 is about 512.5397940149.

The spelling of 134642687 in words is "one hundred thirty-four million, six hundred forty-two thousand, six hundred eighty-seven".