135340681 has 8 divisors (see below), whose sum is σ = 155324160. Its totient is φ = 115519488.

The previous prime is 135340649. The next prime is 135340727. The reversal of 135340681 is 186043531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135340681 - 2⁵ = 135340649 is a prime.

It is a super-2 number, since 2×135340681² = 36634199867087522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135340081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38776 + ... + 42121.

It is an arithmetic number, because the mean of its divisors is an integer number (19415520).

Almost surely, 2^135340681 is an apocalyptic number.

It is an amenable number.

135340681 is a deficient number, since it is larger than the sum of its proper divisors (19983479).

135340681 is an equidigital number, since it uses as much as digits as its factorization.

135340681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81143.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 135340681 is about 11633.6013770457. The cubic root of 135340681 is about 513.4239447157.

The spelling of 135340681 in words is "one hundred thirty-five million, three hundred forty thousand, six hundred eighty-one".