491895313 has 32 divisors (see below), whose sum is σ = 646410240. Its totient is φ = 363424320.

The previous prime is 491895293. The next prime is 491895343. The reversal of 491895313 is 313598194.

It is a de Polignac number, because none of the positive numbers 2^k-491895313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 491895313.

It is not an unprimeable number, because it can be changed into a prime (491895343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120756 + ... + 124762.

It is an arithmetic number, because the mean of its divisors is an integer number (20200320).

Almost surely, 2^491895313 is an apocalyptic number.

It is an amenable number.

491895313 is a deficient number, since it is larger than the sum of its proper divisors (154514927).

491895313 is a wasteful number, since it uses less digits than its factorization.

491895313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4117.

The product of its digits is 116640, while the sum is 43.

The square root of 491895313 is about 22178.7130600493. The cubic root of 491895313 is about 789.3886810520.

The spelling of 491895313 in words is "four hundred ninety-one million, eight hundred ninety-five thousand, three hundred thirteen".