10317721 has 4 divisors (see below), whose sum is σ = 10557712. Its totient is φ = 10077732.

The previous prime is 10317719. The next prime is 10317733. The reversal of 10317721 is 12771301.

10317721 is digitally balanced in base 3, 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 10317721 - 2¹ = 10317719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10317692 and 10317701.

It is not an unprimeable number, because it can be changed into a prime (10317701) 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, 119931 + ... + 120016.

It is an arithmetic number, because the mean of its divisors is an integer number (2639428).

Almost surely, 2^10317721 is an apocalyptic number.

It is an amenable number.

10317721 is a deficient number, since it is larger than the sum of its proper divisors (239991).

10317721 is an equidigital number, since it uses as much as digits as its factorization.

10317721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239990.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 10317721 is about 3212.1209504002. The cubic root of 10317721 is about 217.7014190876.

The spelling of 10317721 in words is "ten million, three hundred seventeen thousand, seven hundred twenty-one".