729860681 has 8 divisors (see below), whose sum is σ = 808096224. Its totient is φ = 653605920.

The previous prime is 729860671. The next prime is 729860687. The reversal of 729860681 is 186068927.

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

It is a de Polignac number, because none of the positive numbers 2^k-729860681 is a prime.

It is a super-2 number, since 2×729860681² = 1065393227339567522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729860687) 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, 494420 + ... + 495893.

It is an arithmetic number, because the mean of its divisors is an integer number (101012028).

Almost surely, 2^729860681 is an apocalyptic number.

It is an amenable number.

729860681 is a deficient number, since it is larger than the sum of its proper divisors (78235543).

729860681 is a wasteful number, since it uses less digits than its factorization.

729860681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990391.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 729860681 is about 27015.9338354239. The cubic root of 729860681 is about 900.3540504140.

The spelling of 729860681 in words is "seven hundred twenty-nine million, eight hundred sixty thousand, six hundred eighty-one".