109138529 has 2 divisors, whose sum is σ = 109138530. Its totient is φ = 109138528.

The previous prime is 109138517. The next prime is 109138543. The reversal of 109138529 is 925831901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100000000 + 9138529 = 10000^2 + 3023^2 .

It is a cyclic number.

It is not a de Polignac number, because 109138529 - 2²⁰ = 108089953 is a prime.

It is a super-2 number, since 2×109138529² = 23822437024567682, which contains 22 as substring.

It is a Chen prime.

It is equal to p_6256658 and since 109138529 and 6256658 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 109138492 and 109138501.

It is not a weakly prime, because it can be changed into another prime (109138129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54569264 + 54569265.

It is an arithmetic number, because the mean of its divisors is an integer number (54569265).

Almost surely, 2^109138529 is an apocalyptic number.

It is an amenable number.

109138529 is a deficient number, since it is larger than the sum of its proper divisors (1).

109138529 is an equidigital number, since it uses as much as digits as its factorization.

109138529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 109138529 is about 10446.9387382142. The cubic root of 109138529 is about 477.8878973003.

The spelling of 109138529 in words is "one hundred nine million, one hundred thirty-eight thousand, five hundred twenty-nine".