103641661 has 4 divisors (see below), whose sum is σ = 103697212. Its totient is φ = 103586112.

The previous prime is 103641647. The next prime is 103641667. The reversal of 103641661 is 166146301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90136036 + 13505625 = 9494^2 + 3675^2 .

It is a cyclic number.

It is not a de Polignac number, because 103641661 - 2⁹ = 103641149 is a prime.

It is a super-3 number, since 3×103641661³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103641667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24876 + ... + 28741.

It is an arithmetic number, because the mean of its divisors is an integer number (25924303).

Almost surely, 2^103641661 is an apocalyptic number.

It is an amenable number.

103641661 is a deficient number, since it is larger than the sum of its proper divisors (55551).

103641661 is an equidigital number, since it uses as much as digits as its factorization.

103641661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55550.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 103641661 is about 10180.4548523138. The cubic root of 103641661 is about 469.7262038944.

Adding to 103641661 its reverse (166146301), we get a palindrome (269787962).

The spelling of 103641661 in words is "one hundred three million, six hundred forty-one thousand, six hundred sixty-one".