617041985 has 8 divisors (see below), whose sum is σ = 846229056. Its totient is φ = 423114480.

The previous prime is 617041981. The next prime is 617041987. The reversal of 617041985 is 589140716.

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

It is not a de Polignac number, because 617041985 - 2² = 617041981 is a prime.

It is a super-2 number, since 2×617041985² = 761481622505480450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (617041981) 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, 8814851 + ... + 8814920.

It is an arithmetic number, because the mean of its divisors is an integer number (105778632).

Almost surely, 2^617041985 is an apocalyptic number.

It is an amenable number.

617041985 is a deficient number, since it is larger than the sum of its proper divisors (229187071).

617041985 is a wasteful number, since it uses less digits than its factorization.

617041985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17629783.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 617041985 is about 24840.3298085996. The cubic root of 617041985 is about 851.3436580213.

The spelling of 617041985 in words is "six hundred seventeen million, forty-one thousand, nine hundred eighty-five".