14838409891 has 2 divisors, whose sum is σ = 14838409892. Its totient is φ = 14838409890.

The previous prime is 14838409889. The next prime is 14838409913. The reversal of 14838409891 is 19890483841.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 14838409891 - 2¹ = 14838409889 is a prime.

It is a super-4 number, since 4×14838409891⁴ (a number of 42 digits) contains 4444 as substring.

Together with 14838409889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (14838409291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7419204945 + 7419204946.

It is an arithmetic number, because the mean of its divisors is an integer number (7419204946).

Almost surely, 2^14838409891 is an apocalyptic number.

14838409891 is a deficient number, since it is larger than the sum of its proper divisors (1).

14838409891 is an equidigital number, since it uses as much as digits as its factorization.

14838409891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 55.

The spelling of 14838409891 in words is "fourteen billion, eight hundred thirty-eight million, four hundred nine thousand, eight hundred ninety-one".