65317491 has 12 divisors (see below), whose sum is σ = 94578120. Its totient is φ = 43438560.

The previous prime is 65317489. The next prime is 65317513. The reversal of 65317491 is 19471356.

It is not a de Polignac number, because 65317491 - 2¹ = 65317489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65317411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4890 + ... + 12431.

It is an arithmetic number, because the mean of its divisors is an integer number (7881510).

Almost surely, 2^65317491 is an apocalyptic number.

65317491 is a deficient number, since it is larger than the sum of its proper divisors (29260629).

65317491 is a wasteful number, since it uses less digits than its factorization.

65317491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17746 (or 17743 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 65317491 is about 8081.9237190164. The cubic root of 65317491 is about 402.7261509597.

The spelling of 65317491 in words is "sixty-five million, three hundred seventeen thousand, four hundred ninety-one".