101005603 has 2 divisors, whose sum is σ = 101005604. Its totient is φ = 101005602.

The previous prime is 101005549. The next prime is 101005609. The reversal of 101005603 is 306500101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101005603 - 2¹⁷ = 100874531 is a prime.

It is not a weakly prime, because it can be changed into another prime (101005609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50502801 + 50502802.

It is an arithmetic number, because the mean of its divisors is an integer number (50502802).

Almost surely, 2^101005603 is an apocalyptic number.

101005603 is a deficient number, since it is larger than the sum of its proper divisors (1).

101005603 is an equidigital number, since it uses as much as digits as its factorization.

101005603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 101005603 is about 10050.1543769238. The cubic root of 101005603 is about 465.7095622463.

Adding to 101005603 its reverse (306500101), we get a palindrome (407505704).

The spelling of 101005603 in words is "one hundred one million, five thousand, six hundred three".