731013 has 4 divisors (see below), whose sum is σ = 974688. Its totient is φ = 487340.

The previous prime is 730999. The next prime is 731033. The reversal of 731013 is 310137.

731013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 731013 - 2⁸ = 730757 is a prime.

It is an Ulam number.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 730983 and 731001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731033) 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, 121833 + ... + 121838.

It is an arithmetic number, because the mean of its divisors is an integer number (243672).

2⁷³¹⁰¹³ is an apocalyptic number.

It is an amenable number.

731013 is a deficient number, since it is larger than the sum of its proper divisors (243675).

731013 is a wasteful number, since it uses less digits than its factorization.

731013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243674.

The product of its (nonzero) digits is 63, while the sum is 15.

The square root of 731013 is about 854.9929824273. The cubic root of 731013 is about 90.0827633742.

The spelling of 731013 in words is "seven hundred thirty-one thousand, thirteen".