1319641663 has 4 divisors (see below), whose sum is σ = 1350331048. Its totient is φ = 1288952280.

The previous prime is 1319641657. The next prime is 1319641693. The reversal of 1319641663 is 3661469131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1319641663 - 2⁹ = 1319641151 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 (1319641693) 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, 15344628 + ... + 15344713.

It is an arithmetic number, because the mean of its divisors is an integer number (337582762).

Almost surely, 2^1319641663 is an apocalyptic number.

1319641663 is a deficient number, since it is larger than the sum of its proper divisors (30689385).

1319641663 is an equidigital number, since it uses as much as digits as its factorization.

1319641663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30689384.

The product of its digits is 69984, while the sum is 40.

The square root of 1319641663 is about 36326.8724637836. The cubic root of 1319641663 is about 1096.8620384158.

The spelling of 1319641663 in words is "one billion, three hundred nineteen million, six hundred forty-one thousand, six hundred sixty-three".