81730695 has 8 divisors (see below), whose sum is σ = 130769136. Its totient is φ = 43589696.

The previous prime is 81730673. The next prime is 81730699. The reversal of 81730695 is 59603718.

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

It is a cyclic number.

It is not a de Polignac number, because 81730695 - 2⁷ = 81730567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81730699) 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, 2724342 + ... + 2724371.

It is an arithmetic number, because the mean of its divisors is an integer number (16346142).

Almost surely, 2^81730695 is an apocalyptic number.

81730695 is a deficient number, since it is larger than the sum of its proper divisors (49038441).

81730695 is a wasteful number, since it uses less digits than its factorization.

81730695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5448721.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 81730695 is about 9040.5030280400. The cubic root of 81730695 is about 433.9720210325.

The spelling of 81730695 in words is "eighty-one million, seven hundred thirty thousand, six hundred ninety-five".