728317713 has 4 divisors (see below), whose sum is σ = 971090288. Its totient is φ = 485545140.

The previous prime is 728317693. The next prime is 728317817. The reversal of 728317713 is 317713827.

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 not a de Polignac number, because 728317713 - 2¹² = 728313617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728317313) 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, 121386283 + ... + 121386288.

It is an arithmetic number, because the mean of its divisors is an integer number (242772572).

Almost surely, 2^728317713 is an apocalyptic number.

It is an amenable number.

728317713 is a deficient number, since it is larger than the sum of its proper divisors (242772575).

728317713 is a wasteful number, since it uses less digits than its factorization.

728317713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242772574.

The product of its digits is 49392, while the sum is 39.

The square root of 728317713 is about 26987.3620978413. The cubic root of 728317713 is about 899.7191358163.

The spelling of 728317713 in words is "seven hundred twenty-eight million, three hundred seventeen thousand, seven hundred thirteen".