14001491821 has 2 divisors, whose sum is σ = 14001491822. Its totient is φ = 14001491820.

The previous prime is 14001491783. The next prime is 14001491831. The reversal of 14001491821 is 12819410041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13991341225 + 10150596 = 118285^2 + 3186^2 .

It is a cyclic number.

It is not a de Polignac number, because 14001491821 - 2¹¹ = 14001489773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14001491831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7000745910 + 7000745911.

It is an arithmetic number, because the mean of its divisors is an integer number (7000745911).

Almost surely, 2^14001491821 is an apocalyptic number.

It is an amenable number.

14001491821 is a deficient number, since it is larger than the sum of its proper divisors (1).

14001491821 is an equidigital number, since it uses as much as digits as its factorization.

14001491821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 14001491821 in words is "fourteen billion, one million, four hundred ninety-one thousand, eight hundred twenty-one".