1601620003 has 2 divisors, whose sum is σ = 1601620004. Its totient is φ = 1601620002.

The previous prime is 1601620001. The next prime is 1601620039. The reversal of 1601620003 is 3000261061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1601620003 - 2¹ = 1601620001 is a prime.

Together with 1601620001, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1601620001) 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, 800810001 + 800810002.

It is an arithmetic number, because the mean of its divisors is an integer number (800810002).

Almost surely, 2^1601620003 is an apocalyptic number.

1601620003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601620003 is an equidigital number, since it uses as much as digits as its factorization.

1601620003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1601620003 is about 40020.2449142931. The cubic root of 1601620003 is about 1170.0017052596.

Adding to 1601620003 its reverse (3000261061), we get a palindrome (4601881064).

The spelling of 1601620003 in words is "one billion, six hundred one million, six hundred twenty thousand, three".