100108661 has 2 divisors, whose sum is σ = 100108662. Its totient is φ = 100108660.

The previous prime is 100108607. The next prime is 100108669. The reversal of 100108661 is 166801001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93508900 + 6599761 = 9670^2 + 2569^2 .

It is a cyclic number.

It is not a de Polignac number, because 100108661 - 2¹⁸ = 99846517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100108669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50054330 + 50054331.

It is an arithmetic number, because the mean of its divisors is an integer number (50054331).

Almost surely, 2^100108661 is an apocalyptic number.

It is an amenable number.

100108661 is a deficient number, since it is larger than the sum of its proper divisors (1).

100108661 is an equidigital number, since it uses as much as digits as its factorization.

100108661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 100108661 is about 10005.4315748997. The cubic root of 100108661 is about 464.3269423992.

Adding to 100108661 its reverse (166801001), we get a palindrome (266909662).

The spelling of 100108661 in words is "one hundred million, one hundred eight thousand, six hundred sixty-one".