713721 has 8 divisors (see below), whose sum is σ = 964960. Its totient is φ = 469152.

The previous prime is 713681. The next prime is 713737. The reversal of 713721 is 127317.

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

It is not a de Polignac number, because 713721 - 2¹⁰ = 712697 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 713721.

It is not an unprimeable number, because it can be changed into a prime (713771) 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, 1411 + ... + 1848.

It is an arithmetic number, because the mean of its divisors is an integer number (120620).

2⁷¹³⁷²¹ is an apocalyptic number.

It is an amenable number.

713721 is a deficient number, since it is larger than the sum of its proper divisors (251239).

713721 is a wasteful number, since it uses less digits than its factorization.

713721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3335.

The product of its digits is 294, while the sum is 21.

The square root of 713721 is about 844.8200991927. The cubic root of 713721 is about 89.3667899610.

The spelling of 713721 in words is "seven hundred thirteen thousand, seven hundred twenty-one".