616446217 has 4 divisors (see below), whose sum is σ = 616776516. Its totient is φ = 616115920.

The previous prime is 616446199. The next prime is 616446221. The reversal of 616446217 is 712644616.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 411927616 + 204518601 = 20296^2 + 14301^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616446217 is a prime.

It is a super-2 number, since 2×616446217² = 760011876907222178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616446287) 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, 162334 + ... + 166087.

It is an arithmetic number, because the mean of its divisors is an integer number (154194129).

Almost surely, 2^616446217 is an apocalyptic number.

It is an amenable number.

616446217 is a deficient number, since it is larger than the sum of its proper divisors (330299).

616446217 is a wasteful number, since it uses less digits than its factorization.

616446217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330298.

The product of its digits is 48384, while the sum is 37.

The square root of 616446217 is about 24828.3349622966. The cubic root of 616446217 is about 851.0695726013.

The spelling of 616446217 in words is "six hundred sixteen million, four hundred forty-six thousand, two hundred seventeen".