100203601 has 2 divisors, whose sum is σ = 100203602. Its totient is φ = 100203600.

The previous prime is 100203599. The next prime is 100203637. The reversal of 100203601 is 106302001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99201600 + 1002001 = 9960^2 + 1001^2 .

It is a cyclic number.

It is not a de Polignac number, because 100203601 - 2¹ = 100203599 is a prime.

Together with 100203599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (100203001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50101800 + 50101801.

It is an arithmetic number, because the mean of its divisors is an integer number (50101801).

Almost surely, 2^100203601 is an apocalyptic number.

It is an amenable number.

100203601 is a deficient number, since it is larger than the sum of its proper divisors (1).

100203601 is an equidigital number, since it uses as much as digits as its factorization.

100203601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 100203601 is about 10010.1748735974. The cubic root of 100203601 is about 464.4736805238.

Adding to 100203601 its reverse (106302001), we get a palindrome (206505602).

The spelling of 100203601 in words is "one hundred million, two hundred three thousand, six hundred one".