13192891405 has 4 divisors (see below), whose sum is σ = 15831469692. Its totient is φ = 10554313120.

The previous prime is 13192891403. The next prime is 13192891423. The reversal of 13192891405 is 50419829131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1792844964 + 11400046441 = 42342^2 + 106771^2 .

It is not a de Polignac number, because 13192891405 - 2¹ = 13192891403 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 (13192891403) 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, 1319289136 + ... + 1319289145.

It is an arithmetic number, because the mean of its divisors is an integer number (3957867423).

Almost surely, 2^13192891405 is an apocalyptic number.

It is an amenable number.

13192891405 is a deficient number, since it is larger than the sum of its proper divisors (2638578287).

13192891405 is an equidigital number, since it uses as much as digits as its factorization.

13192891405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638578286.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 13192891405 in words is "thirteen billion, one hundred ninety-two million, eight hundred ninety-one thousand, four hundred five".