13998431291 has 4 divisors (see below), whose sum is σ = 15075233712. Its totient is φ = 12921628872.

The previous prime is 13998431201. The next prime is 13998431303. The reversal of 13998431291 is 19213489931.

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

It is a cyclic number.

It is not a de Polignac number, because 13998431291 - 2¹⁰ = 13998430267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13998431201) 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, 538401191 + ... + 538401216.

It is an arithmetic number, because the mean of its divisors is an integer number (3768808428).

Almost surely, 2^13998431291 is an apocalyptic number.

13998431291 is a deficient number, since it is larger than the sum of its proper divisors (1076802421).

13998431291 is a wasteful number, since it uses less digits than its factorization.

13998431291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076802420.

The product of its digits is 419904, while the sum is 50.

The spelling of 13998431291 in words is "thirteen billion, nine hundred ninety-eight million, four hundred thirty-one thousand, two hundred ninety-one".