134791681 has 16 divisors (see below), whose sum is σ = 147571200. Its totient is φ = 122629248.

The previous prime is 134791673. The next prime is 134791747. The reversal of 134791681 is 186197431.

It is a cyclic number.

It is not a de Polignac number, because 134791681 - 2³ = 134791673 is a prime.

It is a super-2 number, since 2×134791681² = 36337594533611522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134791621) 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, 122325 + ... + 123421.

It is an arithmetic number, because the mean of its divisors is an integer number (9223200).

Almost surely, 2^134791681 is an apocalyptic number.

It is an amenable number.

134791681 is a deficient number, since it is larger than the sum of its proper divisors (12779519).

134791681 is a wasteful number, since it uses less digits than its factorization.

134791681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368.

The product of its digits is 36288, while the sum is 40.

The square root of 134791681 is about 11609.9819551970. The cubic root of 134791681 is about 512.7287811402.

The spelling of 134791681 in words is "one hundred thirty-four million, seven hundred ninety-one thousand, six hundred eighty-one".