731081361 has 8 divisors (see below), whose sum is σ = 977569600. Its totient is φ = 485990352.

The previous prime is 731081321. The next prime is 731081369. The reversal of 731081361 is 163180137.

731081361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 731081361 - 2⁷ = 731081233 is a prime.

It is a super-2 number, since 2×731081361² = 1068959912803224642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731081369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348085 + ... + 350178.

It is an arithmetic number, because the mean of its divisors is an integer number (122196200).

Almost surely, 2^731081361 is an apocalyptic number.

It is an amenable number.

731081361 is a deficient number, since it is larger than the sum of its proper divisors (246488239).

731081361 is a wasteful number, since it uses less digits than its factorization.

731081361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698615.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 731081361 is about 27038.5162499720. The cubic root of 731081361 is about 900.8557132968.

The spelling of 731081361 in words is "seven hundred thirty-one million, eighty-one thousand, three hundred sixty-one".