1063684321387 has 4 divisors (see below), whose sum is σ = 1100363091120. Its totient is φ = 1027005551656.

The previous prime is 1063684321309. The next prime is 1063684321393. The reversal of 1063684321387 is 7831234863601.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1063684321387 is a prime.

It is a super-2 number, since 2×1063684321387² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1063684321187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18339384823 + ... + 18339384880.

It is an arithmetic number, because the mean of its divisors is an integer number (275090772780).

Almost surely, 2^{1063684321387} is an apocalyptic number.

1063684321387 is a deficient number, since it is larger than the sum of its proper divisors (36678769733).

1063684321387 is an equidigital number, since it uses as much as digits as its factorization.

1063684321387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36678769732.

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 1063684321387 in words is "one trillion, sixty-three billion, six hundred eighty-four million, three hundred twenty-one thousand, three hundred eighty-seven".