461218591 has 2 divisors, whose sum is σ = 461218592. Its totient is φ = 461218590.

The previous prime is 461218547. The next prime is 461218601. The reversal of 461218591 is 195812164.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 461218591 - 2⁷ = 461218463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 461218591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461218501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230609295 + 230609296.

It is an arithmetic number, because the mean of its divisors is an integer number (230609296).

Almost surely, 2^461218591 is an apocalyptic number.

461218591 is a deficient number, since it is larger than the sum of its proper divisors (1).

461218591 is an equidigital number, since it uses as much as digits as its factorization.

461218591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 37.

The square root of 461218591 is about 21476.0003492270. Note that the first 3 decimals coincide. The cubic root of 461218591 is about 772.6253172062.

The spelling of 461218591 in words is "four hundred sixty-one million, two hundred eighteen thousand, five hundred ninety-one".