1639316339 has 4 divisors (see below), whose sum is σ = 1683622224. Its totient is φ = 1595010456.

The previous prime is 1639316311. The next prime is 1639316353. The reversal of 1639316339 is 9336139361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9336139361 = 47 ⋅198641263.

It is a cyclic number.

It is not a de Polignac number, because 1639316339 - 2¹² = 1639312243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1639316339.

It is not an unprimeable number, because it can be changed into a prime (1639316309) 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, 22152887 + ... + 22152960.

It is an arithmetic number, because the mean of its divisors is an integer number (420905556).

Almost surely, 2^1639316339 is an apocalyptic number.

1639316339 is a deficient number, since it is larger than the sum of its proper divisors (44305885).

1639316339 is an equidigital number, since it uses as much as digits as its factorization.

1639316339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44305884.

The product of its digits is 236196, while the sum is 44.

The square root of 1639316339 is about 40488.4716802203. The cubic root of 1639316339 is about 1179.1098186653.

The spelling of 1639316339 in words is "one billion, six hundred thirty-nine million, three hundred sixteen thousand, three hundred thirty-nine".