103721663 has 2 divisors, whose sum is σ = 103721664. Its totient is φ = 103721662.

The previous prime is 103721623. The next prime is 103721711. The reversal of 103721663 is 366127301.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 103721663 - 2¹⁸ = 103459519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103721623) 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, 51860831 + 51860832.

It is an arithmetic number, because the mean of its divisors is an integer number (51860832).

Almost surely, 2^103721663 is an apocalyptic number.

103721663 is a deficient number, since it is larger than the sum of its proper divisors (1).

103721663 is an equidigital number, since it uses as much as digits as its factorization.

103721663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 103721663 is about 10184.3832901163. The cubic root of 103721663 is about 469.8470348754.

Adding to 103721663 its reverse (366127301), we get a palindrome (469848964).

The spelling of 103721663 in words is "one hundred three million, seven hundred twenty-one thousand, six hundred sixty-three".