617721316 has 45 divisors (see below), whose sum is σ = 1175906991. Its totient is φ = 283932096.

The previous prime is 617721287. The next prime is 617721323. The reversal of 617721316 is 613127716.

The square root of 617721316 is 24854.

It is a perfect power (a square), and thus also a powerful number.

617721316 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 191711716 + 426009600 = 13846^2 + 20640^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 14365591 + ... + 14365633.

Almost surely, 2^617721316 is an apocalyptic number.

617721316 is the 24854-th square number.

It is an amenable number.

617721316 is a deficient number, since it is larger than the sum of its proper divisors (558185675).

617721316 is an frugal number, since it uses more digits than its factorization.

617721316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 62 counting only the distinct ones).

The product of its digits is 10584, while the sum is 34.

The cubic root of 617721316 is about 851.6559717374.

The spelling of 617721316 in words is "six hundred seventeen million, seven hundred twenty-one thousand, three hundred sixteen".