681294135 has 32 divisors (see below), whose sum is σ = 1125568512. Its totient is φ = 351630720.

The previous prime is 681294127. The next prime is 681294137. The reversal of 681294135 is 531492186.

It is not a de Polignac number, because 681294135 - 2³ = 681294127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 681294093 and 681294102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681294137) 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 31 ways as a sum of consecutive naturals, for example, 102792 + ... + 109218.

It is an arithmetic number, because the mean of its divisors is an integer number (35174016).

Almost surely, 2^681294135 is an apocalyptic number.

681294135 is a deficient number, since it is larger than the sum of its proper divisors (444274377).

681294135 is a wasteful number, since it uses less digits than its factorization.

681294135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6663.

The product of its digits is 51840, while the sum is 39.

The square root of 681294135 is about 26101.6117318452. The cubic root of 681294135 is about 879.9234329905.

The spelling of 681294135 in words is "six hundred eighty-one million, two hundred ninety-four thousand, one hundred thirty-five".