14001989 has 2 divisors, whose sum is σ = 14001990. Its totient is φ = 14001988.

The previous prime is 14001971. The next prime is 14002003. The reversal of 14001989 is 98910041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12602500 + 1399489 = 3550^2 + 1183^2 .

It is an emirp because it is prime and its reverse (98910041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14001989 is a prime.

It is a super-2 number, since 2×14001989² = 392111391912242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14001919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7000994 + 7000995.

It is an arithmetic number, because the mean of its divisors is an integer number (7000995).

Almost surely, 2^14001989 is an apocalyptic number.

It is an amenable number.

14001989 is a deficient number, since it is larger than the sum of its proper divisors (1).

14001989 is an equidigital number, since it uses as much as digits as its factorization.

14001989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 14001989 is about 3741.9231686394. The cubic root of 14001989 is about 241.0256396222.

The spelling of 14001989 in words is "fourteen million, one thousand, nine hundred eighty-nine".