63478861 has 2 divisors, whose sum is σ = 63478862. Its totient is φ = 63478860.

The previous prime is 63478859. The next prime is 63478903. The reversal of 63478861 is 16887436.

63478861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63441225 + 37636 = 7965^2 + 194^2 .

It is a cyclic number.

It is not a de Polignac number, because 63478861 - 2¹ = 63478859 is a prime.

Together with 63478859, 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 (63478841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31739430 + 31739431.

It is an arithmetic number, because the mean of its divisors is an integer number (31739431).

Almost surely, 2^63478861 is an apocalyptic number.

It is an amenable number.

63478861 is a deficient number, since it is larger than the sum of its proper divisors (1).

63478861 is an equidigital number, since it uses as much as digits as its factorization.

63478861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The square root of 63478861 is about 7967.3622360227. The cubic root of 63478861 is about 398.9113334509.

The spelling of 63478861 in words is "sixty-three million, four hundred seventy-eight thousand, eight hundred sixty-one".