63987882397 has 4 divisors (see below), whose sum is σ = 63999377980. Its totient is φ = 63976386816.

The previous prime is 63987882383. The next prime is 63987882421. The reversal of 63987882397 is 79328878936.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18761054841 + 45226827556 = 136971^2 + 212666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63987882397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63987882317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5739438 + ... + 5750575.

It is an arithmetic number, because the mean of its divisors is an integer number (15999844495).

Almost surely, 2^63987882397 is an apocalyptic number.

It is an amenable number.

63987882397 is a deficient number, since it is larger than the sum of its proper divisors (11495583).

63987882397 is a wasteful number, since it uses less digits than its factorization.

63987882397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11495582.

The product of its digits is 219469824, while the sum is 70.

The spelling of 63987882397 in words is "sixty-three billion, nine hundred eighty-seven million, eight hundred eighty-two thousand, three hundred ninety-seven".