1620103 has 2 divisors, whose sum is σ = 1620104. Its totient is φ = 1620102.

The previous prime is 1620071. The next prime is 1620107. The reversal of 1620103 is 3010261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1620103 - 2⁵ = 1620071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1620107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810051 + 810052.

It is an arithmetic number, because the mean of its divisors is an integer number (810052).

2^1620103 is an apocalyptic number.

1620103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620103 is an equidigital number, since it uses as much as digits as its factorization.

1620103 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 1620103 is about 1272.8326677140. The cubic root of 1620103 is about 117.4485182648.

Adding to 1620103 its reverse (3010261), we get a palindrome (4630364).

The spelling of 1620103 in words is "one million, six hundred twenty thousand, one hundred three".