729746481 has 4 divisors (see below), whose sum is σ = 972995312. Its totient is φ = 486497652.

The previous prime is 729746473. The next prime is 729746489. The reversal of 729746481 is 184647927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 184647927 = 3 ⋅61549309.

It is an interprime number because it is at equal distance from previous prime (729746473) and next prime (729746489).

It is not a de Polignac number, because 729746481 - 2³ = 729746473 is a prime.

It is a super-2 number, since 2×729746481² = 1065059853063766722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 729746481.

It is not an unprimeable number, because it can be changed into a prime (729746489) 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, 121624411 + ... + 121624416.

It is an arithmetic number, because the mean of its divisors is an integer number (243248828).

Almost surely, 2^729746481 is an apocalyptic number.

It is an amenable number.

729746481 is a deficient number, since it is larger than the sum of its proper divisors (243248831).

729746481 is a wasteful number, since it uses less digits than its factorization.

729746481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243248830.

The product of its digits is 677376, while the sum is 48.

The square root of 729746481 is about 27013.8201852311. The cubic root of 729746481 is about 900.3070890334.

The spelling of 729746481 in words is "seven hundred twenty-nine million, seven hundred forty-six thousand, four hundred eighty-one".