109409171 has 2 divisors, whose sum is σ = 109409172. Its totient is φ = 109409170.

The previous prime is 109409123. The next prime is 109409203. The reversal of 109409171 is 171904901.

It is a happy number.

It is an a-pointer prime, because the next prime (109409203) can be obtained adding 109409171 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109409171 - 2⁶ = 109409107 is a prime.

It is not a weakly prime, because it can be changed into another prime (109409371) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54704585 + 54704586.

It is an arithmetic number, because the mean of its divisors is an integer number (54704586).

Almost surely, 2^109409171 is an apocalyptic number.

109409171 is a deficient number, since it is larger than the sum of its proper divisors (1).

109409171 is an equidigital number, since it uses as much as digits as its factorization.

109409171 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 32.

The square root of 109409171 is about 10459.8838903690. The cubic root of 109409171 is about 478.2825937619.

The spelling of 109409171 in words is "one hundred nine million, four hundred nine thousand, one hundred seventy-one".