16165109 has 2 divisors, whose sum is σ = 16165110. Its totient is φ = 16165108.

The previous prime is 16165091. The next prime is 16165117. The reversal of 16165109 is 90156161.

Together with previous prime (16165091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11662225 + 4502884 = 3415^2 + 2122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16165109 is a prime.

It is a super-2 number, since 2×16165109² = 522621497963762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16165139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8082554 + 8082555.

It is an arithmetic number, because the mean of its divisors is an integer number (8082555).

Almost surely, 2^16165109 is an apocalyptic number.

It is an amenable number.

16165109 is a deficient number, since it is larger than the sum of its proper divisors (1).

16165109 is an equidigital number, since it uses as much as digits as its factorization.

16165109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 16165109 is about 4020.5856538569. The cubic root of 16165109 is about 252.8480134078.

The spelling of 16165109 in words is "sixteen million, one hundred sixty-five thousand, one hundred nine".