917216085 has 8 divisors (see below), whose sum is σ = 1467545760. Its totient is φ = 489181904.

The previous prime is 917216063. The next prime is 917216087. The reversal of 917216085 is 580612719.

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 917216085 - 2⁶ = 917216021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (917216087) 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, 30573855 + ... + 30573884.

It is an arithmetic number, because the mean of its divisors is an integer number (183443220).

Almost surely, 2^917216085 is an apocalyptic number.

It is an amenable number.

917216085 is a deficient number, since it is larger than the sum of its proper divisors (550329675).

917216085 is a wasteful number, since it uses less digits than its factorization.

917216085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61147747.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 917216085 is about 30285.5755269732. The cubic root of 917216085 is about 971.6068188680.

The spelling of 917216085 in words is "nine hundred seventeen million, two hundred sixteen thousand, eighty-five".