729351861 has 8 divisors (see below), whose sum is σ = 1111393344. Its totient is φ = 416772480.

The previous prime is 729351839. The next prime is 729351893. The reversal of 729351861 is 168153927.

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

It is not a de Polignac number, because 729351861 - 2⁶ = 729351797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729351811) 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, 17365500 + ... + 17365541.

It is an arithmetic number, because the mean of its divisors is an integer number (138924168).

Almost surely, 2^729351861 is an apocalyptic number.

It is an amenable number.

729351861 is a deficient number, since it is larger than the sum of its proper divisors (382041483).

729351861 is a wasteful number, since it uses less digits than its factorization.

729351861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34731051.

The product of its digits is 90720, while the sum is 42.

The square root of 729351861 is about 27006.5151583835. The cubic root of 729351861 is about 900.1447754754.

The spelling of 729351861 in words is "seven hundred twenty-nine million, three hundred fifty-one thousand, eight hundred sixty-one".