106171609 has 2 divisors, whose sum is σ = 106171610. Its totient is φ = 106171608.

The previous prime is 106171603. The next prime is 106171627. The reversal of 106171609 is 906171601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105575625 + 595984 = 10275^2 + 772^2 .

It is an emirp because it is prime and its reverse (906171601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 106171609 - 2⁵ = 106171577 is a prime.

It is a super-2 number, since 2×106171609² = 22544821115297762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (106171603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53085804 + 53085805.

It is an arithmetic number, because the mean of its divisors is an integer number (53085805).

Almost surely, 2^106171609 is an apocalyptic number.

It is an amenable number.

106171609 is a deficient number, since it is larger than the sum of its proper divisors (1).

106171609 is an equidigital number, since it uses as much as digits as its factorization.

106171609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 106171609 is about 10303.9608403759. The cubic root of 106171609 is about 473.5176078884.

The spelling of 106171609 in words is "one hundred six million, one hundred seventy-one thousand, six hundred nine".