729825073 has 4 divisors (see below), whose sum is σ = 731701620. Its totient is φ = 727948528.

The previous prime is 729825053. The next prime is 729825127. The reversal of 729825073 is 370528927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 370528927 = 193 ⋅1919839.

It can be written as a sum of positive squares in 2 ways, for example, as 493372944 + 236452129 = 22212^2 + 15377^2 .

It is a cyclic number.

It is not a de Polignac number, because 729825073 - 2²¹ = 727727921 is a prime.

It is a super-4 number, since 4×729825073⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729825013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937690 + ... + 938467.

It is an arithmetic number, because the mean of its divisors is an integer number (182925405).

Almost surely, 2^729825073 is an apocalyptic number.

It is an amenable number.

729825073 is a deficient number, since it is larger than the sum of its proper divisors (1876547).

729825073 is a wasteful number, since it uses less digits than its factorization.

729825073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876546.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 729825073 is about 27015.2748088928. The cubic root of 729825073 is about 900.3394082002.

The spelling of 729825073 in words is "seven hundred twenty-nine million, eight hundred twenty-five thousand, seventy-three".