16765109 has 2 divisors, whose sum is σ = 16765110. Its totient is φ = 16765108.

The previous prime is 16765093. The next prime is 16765117. The reversal of 16765109 is 90156761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11242609 + 5522500 = 3353^2 + 2350^2 .

It is an emirp because it is prime and its reverse (90156761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16765109 - 2⁴ = 16765093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16765129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8382554 + 8382555.

It is an arithmetic number, because the mean of its divisors is an integer number (8382555).

Almost surely, 2^16765109 is an apocalyptic number.

It is an amenable number.

16765109 is a deficient number, since it is larger than the sum of its proper divisors (1).

16765109 is an equidigital number, since it uses as much as digits as its factorization.

16765109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 16765109 is about 4094.5218280039. The cubic root of 16765109 is about 255.9384057951.

The spelling of 16765109 in words is "sixteen million, seven hundred sixty-five thousand, one hundred nine".