616817 has 4 divisors (see below), whose sum is σ = 619380. Its totient is φ = 614256.

The previous prime is 616799. The next prime is 616829. The reversal of 616817 is 718616.

616817 is digitally balanced in base 2, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 99856 + 516961 = 316^2 + 719^2 .

It is a cyclic number.

It is not a de Polignac number, because 616817 - 2¹⁰ = 615793 is a prime.

It is a super-2 number, since 2×616817² = 760926422978, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 616817.

It is not an unprimeable number, because it can be changed into a prime (616877) 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, 878 + ... + 1415.

It is an arithmetic number, because the mean of its divisors is an integer number (154845).

2⁶¹⁶⁸¹⁷ is an apocalyptic number.

It is an amenable number.

616817 is a deficient number, since it is larger than the sum of its proper divisors (2563).

616817 is a wasteful number, since it uses less digits than its factorization.

616817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562.

The product of its digits is 2016, while the sum is 29.

The square root of 616817 is about 785.3769795455. The cubic root of 616817 is about 85.1240173525.

The spelling of 616817 in words is "six hundred sixteen thousand, eight hundred seventeen".