108603661 has 2 divisors, whose sum is σ = 108603662. Its totient is φ = 108603660.

The previous prime is 108603647. The next prime is 108603679. The reversal of 108603661 is 166306801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72675625 + 35928036 = 8525^2 + 5994^2 .

It is a cyclic number.

It is not a de Polignac number, because 108603661 - 2⁷ = 108603533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108603611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54301830 + 54301831.

It is an arithmetic number, because the mean of its divisors is an integer number (54301831).

Almost surely, 2^108603661 is an apocalyptic number.

It is an amenable number.

108603661 is a deficient number, since it is larger than the sum of its proper divisors (1).

108603661 is an equidigital number, since it uses as much as digits as its factorization.

108603661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 108603661 is about 10421.3080273064. The cubic root of 108603661 is about 477.1059380546.

The spelling of 108603661 in words is "one hundred eight million, six hundred three thousand, six hundred sixty-one".