721356713 has 8 divisors (see below), whose sum is σ = 899353920. Its totient is φ = 562096080.

The previous prime is 721356709. The next prime is 721356721. The reversal of 721356713 is 317653127.

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

It is not a de Polignac number, because 721356713 - 2² = 721356709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721356703) 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, 4684058 + ... + 4684211.

It is an arithmetic number, because the mean of its divisors is an integer number (112419240).

Almost surely, 2^721356713 is an apocalyptic number.

It is an amenable number.

721356713 is a deficient number, since it is larger than the sum of its proper divisors (177997207).

721356713 is a wasteful number, since it uses less digits than its factorization.

721356713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9368287.

The product of its digits is 26460, while the sum is 35.

The square root of 721356713 is about 26858.0846859935. The cubic root of 721356713 is about 896.8435571992.

The spelling of 721356713 in words is "seven hundred twenty-one million, three hundred fifty-six thousand, seven hundred thirteen".