616885 has 4 divisors (see below), whose sum is σ = 740268. Its totient is φ = 493504.

The previous prime is 616877. The next prime is 616897. The reversal of 616885 is 588616.

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 380689 + 236196 = 617^2 + 486^2 .

It is a cyclic number.

It is not a de Polignac number, because 616885 - 2³ = 616877 is a prime.

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 616885.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61684 + ... + 61693.

It is an arithmetic number, because the mean of its divisors is an integer number (185067).

2⁶¹⁶⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

616885 is a deficient number, since it is larger than the sum of its proper divisors (123383).

616885 is a wasteful number, since it uses less digits than its factorization.

616885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123382.

The product of its digits is 11520, while the sum is 34.

The square root of 616885 is about 785.4202696646. The cubic root of 616885 is about 85.1271453578.

The spelling of 616885 in words is "six hundred sixteen thousand, eight hundred eighty-five".