729784427 has 2 divisors, whose sum is σ = 729784428. Its totient is φ = 729784426.

The previous prime is 729784421. The next prime is 729784439. The reversal of 729784427 is 724487927.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 729784427 - 2²⁰ = 728735851 is a prime.

It is not a weakly prime, because it can be changed into another prime (729784421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364892213 + 364892214.

It is an arithmetic number, because the mean of its divisors is an integer number (364892214).

Almost surely, 2^729784427 is an apocalyptic number.

729784427 is a deficient number, since it is larger than the sum of its proper divisors (1).

729784427 is an equidigital number, since it uses as much as digits as its factorization.

729784427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1580544, while the sum is 50.

The square root of 729784427 is about 27014.5225203038. The cubic root of 729784427 is about 900.3226937498.

The spelling of 729784427 in words is "seven hundred twenty-nine million, seven hundred eighty-four thousand, four hundred twenty-seven".