63478887431 has 2 divisors, whose sum is σ = 63478887432. Its totient is φ = 63478887430.

The previous prime is 63478887413. The next prime is 63478887443. The reversal of 63478887431 is 13478887436.

Together with previous prime (63478887413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63478887431 - 2²⁶ = 63411778567 is a prime.

It is a super-2 number, since 2×63478887431² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63478887491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31739443715 + 31739443716.

It is an arithmetic number, because the mean of its divisors is an integer number (31739443716).

Almost surely, 2^63478887431 is an apocalyptic number.

63478887431 is a deficient number, since it is larger than the sum of its proper divisors (1).

63478887431 is an equidigital number, since it uses as much as digits as its factorization.

63478887431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21676032, while the sum is 59.

The spelling of 63478887431 in words is "sixty-three billion, four hundred seventy-eight million, eight hundred eighty-seven thousand, four hundred thirty-one".