1620363 has 4 divisors (see below), whose sum is σ = 2160488. Its totient is φ = 1080240.

The previous prime is 1620347. The next prime is 1620371. The reversal of 1620363 is 3630261.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1620363 - 2⁴ = 1620347 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270058 + ... + 270063.

It is an arithmetic number, because the mean of its divisors is an integer number (540122).

2^1620363 is an apocalyptic number.

1620363 is a deficient number, since it is larger than the sum of its proper divisors (540125).

1620363 is an equidigital number, since it uses as much as digits as its factorization.

1620363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540124.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1620363 is about 1272.9347980160. The cubic root of 1620363 is about 117.4548007834.

The spelling of 1620363 in words is "one million, six hundred twenty thousand, three hundred sixty-three".