13919239009 has 6 divisors (see below), whose sum is σ = 15072312246. Its totient is φ = 12848528160.

The previous prime is 13919239001. The next prime is 13919239031. The reversal of 13919239009 is 90093291931.

It can be written as a sum of positive squares in 3 ways, for example, as 1702800225 + 12216438784 = 41265^2 + 110528^2 .

It is not a de Polignac number, because 13919239009 - 2³ = 13919239001 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 13919239009.

It is not an unprimeable number, because it can be changed into a prime (13919239001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41181012 + ... + 41181349.

It is an arithmetic number, because the mean of its divisors is an integer number (2512052041).

Almost surely, 2^13919239009 is an apocalyptic number.

It is an amenable number.

13919239009 is a deficient number, since it is larger than the sum of its proper divisors (1153073237).

13919239009 is an equidigital number, since it uses as much as digits as its factorization.

13919239009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82362387 (or 82362374 counting only the distinct ones).

The product of its (nonzero) digits is 118098, while the sum is 46.

The spelling of 13919239009 in words is "thirteen billion, nine hundred nineteen million, two hundred thirty-nine thousand, nine".