616709 has 4 divisors (see below), whose sum is σ = 653004. Its totient is φ = 580416.

The previous prime is 616703. The next prime is 616717. The reversal of 616709 is 907616.

It is a happy number.

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 494209 + 122500 = 703^2 + 350^2 .

It is a cyclic number.

It is not a de Polignac number, because 616709 - 2¹² = 612613 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616703) 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, 18122 + ... + 18155.

It is an arithmetic number, because the mean of its divisors is an integer number (163251).

2⁶¹⁶⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

616709 is a deficient number, since it is larger than the sum of its proper divisors (36295).

616709 is a wasteful number, since it uses less digits than its factorization.

616709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36294.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 616709 is about 785.3082197456. The cubic root of 616709 is about 85.1190488716.

The spelling of 616709 in words is "six hundred sixteen thousand, seven hundred nine".