109165081 has 2 divisors, whose sum is σ = 109165082. Its totient is φ = 109165080.

The previous prime is 109165073. The next prime is 109165087. The reversal of 109165081 is 180561901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107433225 + 1731856 = 10365^2 + 1316^2 .

It is a cyclic number.

It is not a de Polignac number, because 109165081 - 2³ = 109165073 is a prime.

It is a super-2 number, since 2×109165081² = 23834029819473122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (109165087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54582540 + 54582541.

It is an arithmetic number, because the mean of its divisors is an integer number (54582541).

Almost surely, 2^109165081 is an apocalyptic number.

It is an amenable number.

109165081 is a deficient number, since it is larger than the sum of its proper divisors (1).

109165081 is an equidigital number, since it uses as much as digits as its factorization.

109165081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 109165081 is about 10448.2094638268. The cubic root of 109165081 is about 477.9266488170.

The spelling of 109165081 in words is "one hundred nine million, one hundred sixty-five thousand, eighty-one".