13431543673 has 4 divisors (see below), whose sum is σ = 13437512848. Its totient is φ = 13425574500.

The previous prime is 13431543661. The next prime is 13431543689. The reversal of 13431543673 is 37634513431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37634513431 = 59 ⋅637873109.

It is a cyclic number.

It is not a de Polignac number, because 13431543673 - 2¹⁷ = 13431412601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13431543773) 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, 2981211 + ... + 2985712.

It is an arithmetic number, because the mean of its divisors is an integer number (3359378212).

Almost surely, 2^13431543673 is an apocalyptic number.

It is an amenable number.

13431543673 is a deficient number, since it is larger than the sum of its proper divisors (5969175).

13431543673 is an equidigital number, since it uses as much as digits as its factorization.

13431543673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969174.

The product of its digits is 272160, while the sum is 40.

The spelling of 13431543673 in words is "thirteen billion, four hundred thirty-one million, five hundred forty-three thousand, six hundred seventy-three".