729492761 has 8 divisors (see below), whose sum is σ = 733898880. Its totient is φ = 725099728.

The previous prime is 729492739. The next prime is 729492791. The reversal of 729492761 is 167294927.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-729492761 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729492791) 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 7 ways as a sum of consecutive naturals, for example, 122720 + ... + 128526.

It is an arithmetic number, because the mean of its divisors is an integer number (91737360).

Almost surely, 2^729492761 is an apocalyptic number.

It is an amenable number.

729492761 is a deficient number, since it is larger than the sum of its proper divisors (4406119).

729492761 is a wasteful number, since it uses less digits than its factorization.

729492761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6543.

The product of its digits is 381024, while the sum is 47.

The square root of 729492761 is about 27009.1236621998. The cubic root of 729492761 is about 900.2027366321.

The spelling of 729492761 in words is "seven hundred twenty-nine million, four hundred ninety-two thousand, seven hundred sixty-one".