463128821 has 2 divisors, whose sum is σ = 463128822. Its totient is φ = 463128820.

The previous prime is 463128817. The next prime is 463128823. The reversal of 463128821 is 128821364.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320803921 + 142324900 = 17911^2 + 11930^2 .

It is a cyclic number.

It is not a de Polignac number, because 463128821 - 2² = 463128817 is a prime.

Together with 463128823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (463128823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 231564410 + 231564411.

It is an arithmetic number, because the mean of its divisors is an integer number (231564411).

Almost surely, 2^463128821 is an apocalyptic number.

It is an amenable number.

463128821 is a deficient number, since it is larger than the sum of its proper divisors (1).

463128821 is an equidigital number, since it uses as much as digits as its factorization.

463128821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 35.

The square root of 463128821 is about 21520.4279929559. The cubic root of 463128821 is about 773.6905092832.

The spelling of 463128821 in words is "four hundred sixty-three million, one hundred twenty-eight thousand, eight hundred twenty-one".