729128471 has 2 divisors, whose sum is σ = 729128472. Its totient is φ = 729128470.

The previous prime is 729128459. The next prime is 729128479. The reversal of 729128471 is 174821927.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 729128471 - 2²⁶ = 662019607 is a prime.

It is a super-3 number, since 3×729128471³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (729128479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364564235 + 364564236.

It is an arithmetic number, because the mean of its divisors is an integer number (364564236).

Almost surely, 2^729128471 is an apocalyptic number.

729128471 is a deficient number, since it is larger than the sum of its proper divisors (1).

729128471 is an equidigital number, since it uses as much as digits as its factorization.

729128471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 41.

The square root of 729128471 is about 27002.3789877855. The cubic root of 729128471 is about 900.0528656189.

The spelling of 729128471 in words is "seven hundred twenty-nine million, one hundred twenty-eight thousand, four hundred seventy-one".