1620163 has 4 divisors (see below), whose sum is σ = 1623888. Its totient is φ = 1616440.

The previous prime is 1620161. The next prime is 1620209. The reversal of 1620163 is 3610261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3610261 = 937 ⋅3853.

It is a cyclic number.

It is not a de Polignac number, because 1620163 - 2¹ = 1620161 is a prime.

It is a Duffinian number.

1620163 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1620163.

It is not an unprimeable number, because it can be changed into a prime (1620161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108 + ... + 2113.

It is an arithmetic number, because the mean of its divisors is an integer number (405972).

2^1620163 is an apocalyptic number.

1620163 is a deficient number, since it is larger than the sum of its proper divisors (3725).

1620163 is an equidigital number, since it uses as much as digits as its factorization.

1620163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3724.

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

The square root of 1620163 is about 1272.8562369726. The cubic root of 1620163 is about 117.4499681365.

The spelling of 1620163 in words is "one million, six hundred twenty thousand, one hundred sixty-three".