616831 has 4 divisors (see below), whose sum is σ = 622600. Its totient is φ = 611064.

The previous prime is 616829. The next prime is 616841. The reversal of 616831 is 138616.

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

It is a cyclic number.

It is not a de Polignac number, because 616831 - 2¹ = 616829 is a prime.

It is a super-2 number, since 2×616831² = 760960965122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 616796 and 616805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2721 + ... + 2938.

It is an arithmetic number, because the mean of its divisors is an integer number (155650).

2⁶¹⁶⁸³¹ is an apocalyptic number.

616831 is a deficient number, since it is larger than the sum of its proper divisors (5769).

616831 is a wasteful number, since it uses less digits than its factorization.

616831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5768.

The product of its digits is 864, while the sum is 25.

The square root of 616831 is about 785.3858924121. The cubic root of 616831 is about 85.1246613724.

The spelling of 616831 in words is "six hundred sixteen thousand, eight hundred thirty-one".