616987 has 8 divisors (see below), whose sum is σ = 742400. Its totient is φ = 500904.

The previous prime is 616961. The next prime is 616991. The reversal of 616987 is 789616.

616987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 616987 - 2¹⁹ = 92699 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2187 + ... + 2452.

It is an arithmetic number, because the mean of its divisors is an integer number (92800).

2⁶¹⁶⁹⁸⁷ is an apocalyptic number.

616987 is the 454-th hex number.

616987 is a deficient number, since it is larger than the sum of its proper divisors (125413).

616987 is a wasteful number, since it uses less digits than its factorization.

616987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4665.

The product of its digits is 18144, while the sum is 37.

The square root of 616987 is about 785.4852003698. The cubic root of 616987 is about 85.1318369347.

The spelling of 616987 in words is "six hundred sixteen thousand, nine hundred eighty-seven".