491824513 has 2 divisors, whose sum is σ = 491824514. Its totient is φ = 491824512.

The previous prime is 491824483. The next prime is 491824547. The reversal of 491824513 is 315428194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 491819329 + 5184 = 22177^2 + 72^2 .

It is a cyclic number.

It is not a de Polignac number, because 491824513 - 2²⁵ = 458270081 is a prime.

It is not a weakly prime, because it can be changed into another prime (491824213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245912256 + 245912257.

It is an arithmetic number, because the mean of its divisors is an integer number (245912257).

Almost surely, 2^491824513 is an apocalyptic number.

It is an amenable number.

491824513 is a deficient number, since it is larger than the sum of its proper divisors (1).

491824513 is an equidigital number, since it uses as much as digits as its factorization.

491824513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 491824513 is about 22177.1168775384. The cubic root of 491824513 is about 789.3508061907.

The spelling of 491824513 in words is "four hundred ninety-one million, eight hundred twenty-four thousand, five hundred thirteen".