985491317 has 4 divisors (see below), whose sum is σ = 991537440. Its totient is φ = 979445196.

The previous prime is 985491301. The next prime is 985491323. The reversal of 985491317 is 713194589.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 713194589 = 269 ⋅2651281.

It is a cyclic number.

It is not a de Polignac number, because 985491317 - 2⁴ = 985491301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985401317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3022817 + ... + 3023142.

It is an arithmetic number, because the mean of its divisors is an integer number (247884360).

Almost surely, 2^985491317 is an apocalyptic number.

It is an amenable number.

985491317 is a deficient number, since it is larger than the sum of its proper divisors (6046123).

985491317 is a wasteful number, since it uses less digits than its factorization.

985491317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6046122.

The product of its digits is 272160, while the sum is 47.

The square root of 985491317 is about 31392.5360077838. The cubic root of 985491317 is about 995.1401928672.

The spelling of 985491317 in words is "nine hundred eighty-five million, four hundred ninety-one thousand, three hundred seventeen".