463915021 has 2 divisors, whose sum is σ = 463915022. Its totient is φ = 463915020.

The previous prime is 463915019. The next prime is 463915027. The reversal of 463915021 is 120519364.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249292521 + 214622500 = 15789^2 + 14650^2 .

It is a cyclic number.

It is not a de Polignac number, because 463915021 - 2¹ = 463915019 is a prime.

Together with 463915019, 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 (463915027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 231957510 + 231957511.

It is an arithmetic number, because the mean of its divisors is an integer number (231957511).

Almost surely, 2^463915021 is an apocalyptic number.

It is an amenable number.

463915021 is a deficient number, since it is larger than the sum of its proper divisors (1).

463915021 is an equidigital number, since it uses as much as digits as its factorization.

463915021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 463915021 is about 21538.6866126976. The cubic root of 463915021 is about 774.1280632822.

The spelling of 463915021 in words is "four hundred sixty-three million, nine hundred fifteen thousand, twenty-one".