729686929 has 2 divisors, whose sum is σ = 729686930. Its totient is φ = 729686928.

The previous prime is 729686927. The next prime is 729686933. The reversal of 729686929 is 929686927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 548730625 + 180956304 = 23425^2 + 13452^2 .

It is a cyclic number.

It is not a de Polignac number, because 729686929 - 2¹ = 729686927 is a prime.

Together with 729686927, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (729686927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364843464 + 364843465.

It is an arithmetic number, because the mean of its divisors is an integer number (364843465).

Almost surely, 2^729686929 is an apocalyptic number.

It is an amenable number.

729686929 is a deficient number, since it is larger than the sum of its proper divisors (1).

729686929 is an equidigital number, since it uses as much as digits as its factorization.

729686929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 58.

The square root of 729686929 is about 27012.7179121243. The cubic root of 729686929 is about 900.2825980868.

It can be divided in two parts, 72968 and 6929, that added together give a palindrome (79897).

The spelling of 729686929 in words is "seven hundred twenty-nine million, six hundred eighty-six thousand, nine hundred twenty-nine".