715716721 has 8 divisors (see below), whose sum is σ = 727881984. Its totient is φ = 703565520.

The previous prime is 715716709. The next prime is 715716763. The reversal of 715716721 is 127617517.

715716721 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 a cyclic number.

It is not a de Polignac number, because 715716721 - 2¹³ = 715708529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (715711721) 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, 171360 + ... + 175486.

It is an arithmetic number, because the mean of its divisors is an integer number (90985248).

Almost surely, 2^715716721 is an apocalyptic number.

It is an amenable number.

715716721 is a deficient number, since it is larger than the sum of its proper divisors (12165263).

715716721 is a wasteful number, since it uses less digits than its factorization.

715716721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7031.

The product of its digits is 20580, while the sum is 37.

The square root of 715716721 is about 26752.8824802114. The cubic root of 715716721 is about 894.5000884752.

The spelling of 715716721 in words is "seven hundred fifteen million, seven hundred sixteen thousand, seven hundred twenty-one".