134668681 has 16 divisors (see below), whose sum is σ = 159805440. Its totient is φ = 111050640.

The previous prime is 134668591. The next prime is 134668687. The reversal of 134668681 is 186866431.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 134668681 - 2¹⁵ = 134635913 is a prime.

It is a super-2 number, since 2×134668681² = 36271307284559522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134668687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37110 + ... + 40576.

It is an arithmetic number, because the mean of its divisors is an integer number (9987840).

Almost surely, 2^134668681 is an apocalyptic number.

It is an amenable number.

134668681 is a deficient number, since it is larger than the sum of its proper divisors (25136759).

134668681 is a wasteful number, since it uses less digits than its factorization.

134668681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684.

The product of its digits is 165888, while the sum is 43.

The square root of 134668681 is about 11604.6835803481. The cubic root of 134668681 is about 512.5727753881.

The spelling of 134668681 in words is "one hundred thirty-four million, six hundred sixty-eight thousand, six hundred eighty-one".