491573085 has 16 divisors (see below), whose sum is σ = 787694976. Its totient is φ = 261779648.

The previous prime is 491573081. The next prime is 491573143. The reversal of 491573085 is 580375194.

It is a cyclic number.

It is not a de Polignac number, because 491573085 - 2² = 491573081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491573081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14049 + ... + 34358.

It is an arithmetic number, because the mean of its divisors is an integer number (49230936).

Almost surely, 2^491573085 is an apocalyptic number.

It is an amenable number.

491573085 is a deficient number, since it is larger than the sum of its proper divisors (296121891).

491573085 is a wasteful number, since it uses less digits than its factorization.

491573085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49092.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 491573085 is about 22171.4475170206. The cubic root of 491573085 is about 789.2162739757.

The spelling of 491573085 in words is "four hundred ninety-one million, five hundred seventy-three thousand, eighty-five".