16319999989 has 2 divisors, whose sum is σ = 16319999990. Its totient is φ = 16319999988.

The previous prime is 16319999987. The next prime is 16320000001. The reversal of 16319999989 is 98999991361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16238404900 + 81595089 = 127430^2 + 9033^2 .

It is an emirp because it is prime and its reverse (98999991361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16319999989 - 2¹ = 16319999987 is a prime.

Together with 16319999987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16319999987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8159999994 + 8159999995.

It is an arithmetic number, because the mean of its divisors is an integer number (8159999995).

Almost surely, 2^16319999989 is an apocalyptic number.

It is an amenable number.

16319999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16319999989 is an equidigital number, since it uses as much as digits as its factorization.

16319999989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76527504, while the sum is 73.

The spelling of 16319999989 in words is "sixteen billion, three hundred nineteen million, nine hundred ninety-nine thousand, nine hundred eighty-nine".