14381431891 has 4 divisors (see below), whose sum is σ = 14381826784. Its totient is φ = 14381037000.

The previous prime is 14381431861. The next prime is 14381431901. The reversal of 14381431891 is 19813418341.

It is a happy number.

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 14381431891 - 2⁷ = 14381431763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14381431811) 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, 136560 + ... + 217741.

It is an arithmetic number, because the mean of its divisors is an integer number (3595456696).

Almost surely, 2^14381431891 is an apocalyptic number.

14381431891 is a deficient number, since it is larger than the sum of its proper divisors (394893).

14381431891 is an equidigital number, since it uses as much as digits as its factorization.

14381431891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394892.

The product of its digits is 82944, while the sum is 43.

The spelling of 14381431891 in words is "fourteen billion, three hundred eighty-one million, four hundred thirty-one thousand, eight hundred ninety-one".