731038985 has 4 divisors (see below), whose sum is σ = 877246788. Its totient is φ = 584831184.

The previous prime is 731038961. The next prime is 731039027. The reversal of 731038985 is 589830137.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 367412224 + 363626761 = 19168^2 + 19069^2 .

It is a cyclic number.

It is not a de Polignac number, because 731038985 - 2²⁰ = 729990409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 73103894 + ... + 73103903.

It is an arithmetic number, because the mean of its divisors is an integer number (219311697).

Almost surely, 2^731038985 is an apocalyptic number.

It is an amenable number.

731038985 is a deficient number, since it is larger than the sum of its proper divisors (146207803).

731038985 is a wasteful number, since it uses less digits than its factorization.

731038985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146207802.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 731038985 is about 27037.7326157354. The cubic root of 731038985 is about 900.8383073913.

The spelling of 731038985 in words is "seven hundred thirty-one million, thirty-eight thousand, nine hundred eighty-five".