162816109 has 2 divisors, whose sum is σ = 162816110. Its totient is φ = 162816108.

The previous prime is 162816107. The next prime is 162816133. The reversal of 162816109 is 901618261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83997225 + 78818884 = 9165^2 + 8878^2 .

It is a cyclic number.

It is not a de Polignac number, because 162816109 - 2¹ = 162816107 is a prime.

Together with 162816107, 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 (162816107) 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, 81408054 + 81408055.

It is an arithmetic number, because the mean of its divisors is an integer number (81408055).

Almost surely, 2^162816109 is an apocalyptic number.

It is an amenable number.

162816109 is a deficient number, since it is larger than the sum of its proper divisors (1).

162816109 is an equidigital number, since it uses as much as digits as its factorization.

162816109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 162816109 is about 12759.9415751014. The cubic root of 162816109 is about 546.0500575787.

The spelling of 162816109 in words is "one hundred sixty-two million, eight hundred sixteen thousand, one hundred nine".