16286989 has 2 divisors, whose sum is σ = 16286990. Its totient is φ = 16286988.

The previous prime is 16286987. The next prime is 16287001. The reversal of 16286989 is 98968261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13564489 + 2722500 = 3683^2 + 1650^2 .

It is a cyclic number.

It is not a de Polignac number, because 16286989 - 2¹ = 16286987 is a prime.

It is a super-2 number, since 2×16286989² = 530532021372242, which contains 22 as substring.

Together with 16286987, it forms a pair of twin primes.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16286983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8143494 + 8143495.

It is an arithmetic number, because the mean of its divisors is an integer number (8143495).

Almost surely, 2^16286989 is an apocalyptic number.

It is an amenable number.

16286989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16286989 is an equidigital number, since it uses as much as digits as its factorization.

16286989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 49.

The square root of 16286989 is about 4035.7141871049. The cubic root of 16286989 is about 253.4818886700.

The spelling of 16286989 in words is "sixteen million, two hundred eighty-six thousand, nine hundred eighty-nine".