16603001 has 2 divisors, whose sum is σ = 16603002. Its totient is φ = 16603000.

The previous prime is 16602961. The next prime is 16603003. The reversal of 16603001 is 10030661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11868025 + 4734976 = 3445^2 + 2176^2 .

It is a cyclic number.

It is not a de Polignac number, because 16603001 - 2¹⁴ = 16586617 is a prime.

Together with 16603003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16603003) 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, 8301500 + 8301501.

It is an arithmetic number, because the mean of its divisors is an integer number (8301501).

Almost surely, 2^16603001 is an apocalyptic number.

It is an amenable number.

16603001 is a deficient number, since it is larger than the sum of its proper divisors (1).

16603001 is an equidigital number, since it uses as much as digits as its factorization.

16603001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 16603001 is about 4074.6780240898. The cubic root of 16603001 is about 255.1108117648.

Adding to 16603001 its reverse (10030661), we get a palindrome (26633662).

The spelling of 16603001 in words is "sixteen million, six hundred three thousand, one".