729919445 has 16 divisors (see below), whose sum is σ = 895348080. Its totient is φ = 571044864.

The previous prime is 729919403. The next prime is 729919451. The reversal of 729919445 is 544919927.

It can be written as a sum of positive squares in 8 ways, for example, as 1156 + 729918289 = 34^2 + 27017^2 .

It is a cyclic number.

It is not a de Polignac number, because 729919445 - 2⁶ = 729919381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 729919393 and 729919402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79661 + ... + 88349.

It is an arithmetic number, because the mean of its divisors is an integer number (55959255).

Almost surely, 2^729919445 is an apocalyptic number.

It is an amenable number.

729919445 is a deficient number, since it is larger than the sum of its proper divisors (165428635).

729919445 is a wasteful number, since it uses less digits than its factorization.

729919445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9064.

The product of its digits is 816480, while the sum is 50.

The square root of 729919445 is about 27017.0213939287. The cubic root of 729919445 is about 900.3782134664.

The spelling of 729919445 in words is "seven hundred twenty-nine million, nine hundred nineteen thousand, four hundred forty-five".