13431420399 has 4 divisors (see below), whose sum is σ = 17908560536. Its totient is φ = 8954280264.

The previous prime is 13431420337. The next prime is 13431420407. The reversal of 13431420399 is 99302413431.

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

It is not a de Polignac number, because 13431420399 - 2⁷ = 13431420271 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 (13431430399) 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, 2238570064 + ... + 2238570069.

It is an arithmetic number, because the mean of its divisors is an integer number (4477140134).

Almost surely, 2^13431420399 is an apocalyptic number.

13431420399 is a deficient number, since it is larger than the sum of its proper divisors (4477140137).

13431420399 is an equidigital number, since it uses as much as digits as its factorization.

13431420399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477140136.

The product of its (nonzero) digits is 69984, while the sum is 39.

The spelling of 13431420399 in words is "thirteen billion, four hundred thirty-one million, four hundred twenty thousand, three hundred ninety-nine".