731989441 has 8 divisors (see below), whose sum is σ = 750292200. Its totient is φ = 713708160.

The previous prime is 731989439. The next prime is 731989471. The reversal of 731989441 is 144989137.

It can be written as a sum of positive squares in 4 ways, for example, as 2989441 + 729000000 = 1729^2 + 27000^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 731989441 - 2¹ = 731989439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 731989391 and 731989400.

It is not an unprimeable number, because it can be changed into a prime (731989471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80515 + ... + 89143.

It is an arithmetic number, because the mean of its divisors is an integer number (93786525).

Almost surely, 2^731989441 is an apocalyptic number.

It is an amenable number.

731989441 is a deficient number, since it is larger than the sum of its proper divisors (18302759).

731989441 is a wasteful number, since it uses less digits than its factorization.

731989441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10739.

The product of its digits is 217728, while the sum is 46.

The square root of 731989441 is about 27055.3033802987. The cubic root of 731989441 is about 901.2285448457.

The spelling of 731989441 in words is "seven hundred thirty-one million, nine hundred eighty-nine thousand, four hundred forty-one".