4891327457 has 2 divisors, whose sum is σ = 4891327458. Its totient is φ = 4891327456.

The previous prime is 4891327421. The next prime is 4891327471. The reversal of 4891327457 is 7547231984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3854423056 + 1036904401 = 62084^2 + 32201^2 .

It is a cyclic number.

It is not a de Polignac number, because 4891327457 - 2⁸ = 4891327201 is a prime.

It is not a weakly prime, because it can be changed into another prime (4891327417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2445663728 + 2445663729.

It is an arithmetic number, because the mean of its divisors is an integer number (2445663729).

Almost surely, 2^4891327457 is an apocalyptic number.

It is an amenable number.

4891327457 is a deficient number, since it is larger than the sum of its proper divisors (1).

4891327457 is an equidigital number, since it uses as much as digits as its factorization.

4891327457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 50.

The square root of 4891327457 is about 69938.0258300161. The cubic root of 4891327457 is about 1697.4965987194.

The spelling of 4891327457 in words is "four billion, eight hundred ninety-one million, three hundred twenty-seven thousand, four hundred fifty-seven".