103731661 has 12 divisors (see below), whose sum is σ = 114688224. Its totient is φ = 93046200.

The previous prime is 103731647. The next prime is 103731689. The reversal of 103731661 is 166137301.

It is not a de Polignac number, because 103731661 - 2⁷ = 103731533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103731601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67896 + ... + 69406.

It is an arithmetic number, because the mean of its divisors is an integer number (9557352).

Almost surely, 2^103731661 is an apocalyptic number.

103731661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

103731661 is a deficient number, since it is larger than the sum of its proper divisors (10956563).

103731661 is an equidigital number, since it uses as much as digits as its factorization.

103731661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680 (or 1601 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 103731661 is about 10184.8741278427. The cubic root of 103731661 is about 469.8621309816.

Adding to 103731661 its reverse (166137301), we get a palindrome (269868962).

The spelling of 103731661 in words is "one hundred three million, seven hundred thirty-one thousand, six hundred sixty-one".