616945 has 8 divisors (see below), whose sum is σ = 846144. Its totient is φ = 423024.

The previous prime is 616943. The next prime is 616951. The reversal of 616945 is 549616.

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

It is not a de Polignac number, because 616945 - 2¹ = 616943 is a prime.

It is a super-2 number, since 2×616945² = 761242266050, which contains 22 as substring.

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 (616943) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8779 + ... + 8848.

It is an arithmetic number, because the mean of its divisors is an integer number (105768).

2⁶¹⁶⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

616945 is a deficient number, since it is larger than the sum of its proper divisors (229199).

616945 is a wasteful number, since it uses less digits than its factorization.

616945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17639.

The product of its digits is 6480, while the sum is 31.

The square root of 616945 is about 785.4584648471. The cubic root of 616945 is about 85.1299051715.

The spelling of 616945 in words is "six hundred sixteen thousand, nine hundred forty-five".