63812461 has 2 divisors, whose sum is σ = 63812462. Its totient is φ = 63812460.

The previous prime is 63812459. The next prime is 63812491. The reversal of 63812461 is 16421836.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63202500 + 609961 = 7950^2 + 781^2 .

It is a cyclic number.

It is not a de Polignac number, because 63812461 - 2¹ = 63812459 is a prime.

Together with 63812459, it forms a pair of twin primes.

It is equal to p_3774622 and since 63812461 and 3774622 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63812401) 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, 31906230 + 31906231.

It is an arithmetic number, because the mean of its divisors is an integer number (31906231).

Almost surely, 2^63812461 is an apocalyptic number.

It is an amenable number.

63812461 is a deficient number, since it is larger than the sum of its proper divisors (1).

63812461 is an equidigital number, since it uses as much as digits as its factorization.

63812461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 63812461 is about 7988.2702132564. The cubic root of 63812461 is about 399.6089114991.

The spelling of 63812461 in words is "sixty-three million, eight hundred twelve thousand, four hundred sixty-one".