324128461 has 2 divisors, whose sum is σ = 324128462. Its totient is φ = 324128460.

The previous prime is 324128459. The next prime is 324128479. The reversal of 324128461 is 164821423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 320052100 + 4076361 = 17890^2 + 2019^2 .

It is a cyclic number.

It is not a de Polignac number, because 324128461 - 2¹ = 324128459 is a prime.

Together with 324128459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (324128261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162064230 + 162064231.

It is an arithmetic number, because the mean of its divisors is an integer number (162064231).

Almost surely, 2^324128461 is an apocalyptic number.

It is an amenable number.

324128461 is a deficient number, since it is larger than the sum of its proper divisors (1).

324128461 is an equidigital number, since it uses as much as digits as its factorization.

324128461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 31.

The square root of 324128461 is about 18003.5680074812. The cubic root of 324128461 is about 686.9193058444.

Adding to 324128461 its reverse (164821423), we get a palindrome (488949884).

The spelling of 324128461 in words is "three hundred twenty-four million, one hundred twenty-eight thousand, four hundred sixty-one".