108385661 has 2 divisors, whose sum is σ = 108385662. Its totient is φ = 108385660.

The previous prime is 108385649. The next prime is 108385721. The reversal of 108385661 is 166583801.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100120036 + 8265625 = 10006^2 + 2875^2 .

It is a cyclic number.

It is not a de Polignac number, because 108385661 - 2⁶ = 108385597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108385621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54192830 + 54192831.

It is an arithmetic number, because the mean of its divisors is an integer number (54192831).

Almost surely, 2^108385661 is an apocalyptic number.

It is an amenable number.

108385661 is a deficient number, since it is larger than the sum of its proper divisors (1).

108385661 is an equidigital number, since it uses as much as digits as its factorization.

108385661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 108385661 is about 10410.8434336513. The cubic root of 108385661 is about 476.7864928238.

The spelling of 108385661 in words is "one hundred eight million, three hundred eighty-five thousand, six hundred sixty-one".