1393421986663 has 16 divisors (see below), whose sum is σ = 1593312232960. Its totient is φ = 1193739444000.

The previous prime is 1393421986657. The next prime is 1393421986679. The reversal of 1393421986663 is 3666891243931.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1393421986663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393421984663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202794118 + ... + 202800988.

It is an arithmetic number, because the mean of its divisors is an integer number (99582014560).

Almost surely, 2^{1393421986663} is an apocalyptic number.

1393421986663 is a deficient number, since it is larger than the sum of its proper divisors (199890246297).

1393421986663 is an equidigital number, since it uses as much as digits as its factorization.

1393421986663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17758.

The product of its digits is 30233088, while the sum is 61.

The spelling of 1393421986663 in words is "one trillion, three hundred ninety-three billion, four hundred twenty-one million, nine hundred eighty-six thousand, six hundred sixty-three".