729381261 has 8 divisors (see below), whose sum is σ = 1111438144. Its totient is φ = 416789280.

The previous prime is 729381227. The next prime is 729381371. The reversal of 729381261 is 162183927.

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

It is not a de Polignac number, because 729381261 - 2¹⁰ = 729380237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729381061) 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, 17366200 + ... + 17366241.

It is an arithmetic number, because the mean of its divisors is an integer number (138929768).

Almost surely, 2^729381261 is an apocalyptic number.

It is an amenable number.

729381261 is a deficient number, since it is larger than the sum of its proper divisors (382056883).

729381261 is a wasteful number, since it uses less digits than its factorization.

729381261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34732451.

The product of its digits is 36288, while the sum is 39.

The square root of 729381261 is about 27007.0594659989. The cubic root of 729381261 is about 900.1568701868.

The spelling of 729381261 in words is "seven hundred twenty-nine million, three hundred eighty-one thousand, two hundred sixty-one".