63871477 has 2 divisors, whose sum is σ = 63871478. Its totient is φ = 63871476.

The previous prime is 63871471. The next prime is 63871487. The reversal of 63871477 is 77417836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41460721 + 22410756 = 6439^2 + 4734^2 .

It is a cyclic number.

It is not a de Polignac number, because 63871477 - 2⁷ = 63871349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63871471) 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, 31935738 + 31935739.

It is an arithmetic number, because the mean of its divisors is an integer number (31935739).

Almost surely, 2^63871477 is an apocalyptic number.

It is an amenable number.

63871477 is a deficient number, since it is larger than the sum of its proper divisors (1).

63871477 is an equidigital number, since it uses as much as digits as its factorization.

63871477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 43.

The square root of 63871477 is about 7991.9632756914. The cubic root of 63871477 is about 399.7320643162.

The spelling of 63871477 in words is "sixty-three million, eight hundred seventy-one thousand, four hundred seventy-seven".